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tips, technology, tools and techniques related to vehicle driveline components

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Airwreckc
Eric Cumming
RTP, North Carolina
(252 posts)

Registered:
05/28/2020 10:10AM

Main British Car:
1972 MGB-GT (working on a Sebring project) Buick 300-4 V8

TA Heads for 300, 350 question
Posted by: Airwreckc
Date: January 28, 2024 11:07AM

I'm sure this has been discussed somewhere else, but I've looked and can't find a definitive answer. I am looking to get a set of the TA heads for my 300 block, but I don't see them listed on the TA website. I see 350 heads and Rover heads. Is it the Rover heads I need to be asking them for or are there specific heads for the 300 that aren't currently listed on their website? I read that the production run for these heads is very limited and long lead time, so I want to order some for the future engine work.

Also, a somewhat related question: Some time ago, I saw a post by Jim Blackwood that bemoaned the lack of a TA head for the 350--and also discussed how good an engine it is. Since apparently there are now TA heads for the 350, is there any reason to scrap the 300 option (I planned on doing a 350 stroker crank in mine, which I have) and just use a 350 instead?



Edited 1 time(s). Last edit at 01/28/2024 04:00PM by Airwreckc.


Dan Jones
Dan Jones
St. Louis, Missouri
(280 posts)

Registered:
07/21/2008 03:32PM

Main British Car:
1980 Triumph TR8 3.5L Rover V8

Re: TA Heads for 300, 350 question
Posted by: Dan Jones
Date: January 28, 2024 02:51PM

Yes, the Rover TA heads are the ones that bolt onto Buick 215 and 300 blocks. Be aware that their combustion chambers are smaller than standard Buick 300 heads. As I understand it, TA just finished up a run of the Rover heads. Last I heard, the Buick 350 heads were on back order. Compared to a Buick 300, the Buick 350 is wider with a taller deck height and different port configuration so may be a tighter fit and not allow you to re-use any Buick 300 parts you already have.


Airwreckc
Eric Cumming
RTP, North Carolina
(252 posts)

Registered:
05/28/2020 10:10AM

Main British Car:
1972 MGB-GT (working on a Sebring project) Buick 300-4 V8

Re: TA Heads for 300, 350 question
Posted by: Airwreckc
Date: January 28, 2024 03:58PM

Dan, thanks much. Iíve been doing lots of comparisons between the aluminum 300 heads (which I have) and the TA heads. Obviously lots of different opinions, but I think Iím leaning towards the TA heads as they apparently flow betteróand if I stick with the 300, Iíll be stroking it. I did read a nice write up by Jim Blackwood from several years back (before the 350 TA heads were available) extolling the 350 (if only TA made aluminum heads for it). So it got me wondering if building a 350 would be a lot less trouble than my plan for a stroker 300. As far as existing components, the only thing Iíd be concerned about reusing is the bellhousing and transmission, which I think will bolt up fine.


mgb260
Jim Nichols
Sequim,WA
(2465 posts)

Registered:
02/29/2008 08:29PM

Main British Car:
1973 MGB roadster 260 Ford V8

Re: TA Heads for 300, 350 question
Posted by: mgb260
Date: January 28, 2024 08:15PM

Eric, 350 is taller and wider like the 340. Stick with the 300.


Airwreckc
Eric Cumming
RTP, North Carolina
(252 posts)

Registered:
05/28/2020 10:10AM

Main British Car:
1972 MGB-GT (working on a Sebring project) Buick 300-4 V8

Re: TA Heads for 300, 350 question
Posted by: Airwreckc
Date: January 28, 2024 08:41PM

Jim,

Itís how Iím learning, just wanted to be sure that I wasnít missing something.


BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(6470 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

authors avatar
Re: TA Heads for 300, 350 question
Posted by: BlownMGB-V8
Date: January 29, 2024 03:21PM

A few relevant points here. First, the 350 and 340 are both just that much too big for the car that instead of minimal body mods to make them fit you end up pretty much having to do everything you have to do to fit a 455. And there are no headers for the 350. So skip the 350 and do the stroker 300 instead. A 340 can be done if you'd rather do body mods than the stroker but things like lowering the rack and putting a hole in the hood won't likely make you happy.

The TA Rover heads will fit the 300 block but they need a little welding in the corners to match the 300 block. Look at the points of the lifter valley and you will see that on the 300 iron blocks they angle inward. Next time I order a set from TA I will ask them to do that weld before surfacing the head. (2 places per head). I actually need to pull my heads back off the block, fill them and get them skimmed again, and it would be better if they came already done. There is just enough of a gap there to let oil leak out at the inside 2 corners of the head gasket. This void could be filled with Devcon or JB Weld but to do it properly it needs to be heliarced. Too bad they didn't think of that when making the patterns, but it is an easily resolved problem. The heads will definitely flow much better than anything else available and have a modern chamber configuration. 1.9/1.6" valve size is a good choice that fits without siamezing the seats. Pistons if zero decked will need a 35cc dish for 10.5 compression.

All the Buick engines of that era except the 215 used the standard GM Corporate BOP bellhousing pattern. The Skyhawk cable operated bell is generally considered the best choice for an MGB.

Jim


Airwreckc
Eric Cumming
RTP, North Carolina
(252 posts)

Registered:
05/28/2020 10:10AM

Main British Car:
1972 MGB-GT (working on a Sebring project) Buick 300-4 V8

Re: TA Heads for 300, 350 question
Posted by: Airwreckc
Date: February 08, 2024 12:43PM

Jim,

Thanks for the heads up on the welding of the corners. Turns out that TA says they are only selling raw heads right now as they don't have the personnel to keep up with things like porting, etc. When you pull your heads, it would be great to have a couple of pics of what you do to the heads. Thanks to the "heads up" from Dan, I have just ordered the last set of heads from this production run, so at least I'll have a set when I get my engine out of storage (we just moved). And yes, I am now committed to the 300 stroker :)

As an aside, I found this which got pretty good reviews for high temperature aluminum repairs--perhaps this could be used instead of welding? [www.quiksteel.com]

Glad to hear your thoughts on the Skyhawk bell--I found one on eBay last year, pretty sure that's what I got. And my big ass TR-3650 transmission has an adapter for the BOP pattern. It'll be interesting to see what I need to do the the tunnel to make that fit.

Eric



Edited 2 time(s). Last edit at 02/08/2024 03:37PM by Airwreckc.



ag1234
Arthur Gertz

(71 posts)

Registered:
03/29/2023 08:26PM

Main British Car:


Re: TA Heads for 300, 350 question, how much torque ?
Posted by: ag1234
Date: February 09, 2024 12:52PM

Really ? We are talking LBC's. right ?


ag1234
Arthur Gertz

(71 posts)

Registered:
03/29/2023 08:26PM

Main British Car:


Re: TA Heads for 300, 350 question
Posted by: ag1234
Date: February 09, 2024 01:01PM

I ask to understand the reasoning. Car weighs minus 2,500 ? 4 to 10 speeds ? Needs such massive torque brought by an oversquare build ? TA heads produce enough HP to destroy a much shorter stroke, cast crank. Why do this ?


Airwreckc
Eric Cumming
RTP, North Carolina
(252 posts)

Registered:
05/28/2020 10:10AM

Main British Car:
1972 MGB-GT (working on a Sebring project) Buick 300-4 V8

Re: TA Heads for 300, 350 question
Posted by: Airwreckc
Date: February 09, 2024 02:04PM

Art,

I can only respond with what my plans are. I plan to build something that has a good mid-range. It will, of course, have more than enough low end torque to be very fast off the line, but I am definitely not trying to emphasize that. My plans for induction, gearing (both transmission and rear end), cam, etc. are to push upwards the torque curve, so I'm not just burning my tires up at every stop light.


BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(6470 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

authors avatar
Re: TA Heads for 300, 350 question
Posted by: BlownMGB-V8
Date: February 10, 2024 12:09AM

Torque is good. It makes the car easier to drive. I've been driving mine a lot recently and it is very nice to be able to just let out the clutch without giving it any gas and not worry about stalling the engine.

Jim


DiDueColpi
Fred Key
West coast - Canada
(1367 posts)

Registered:
05/14/2010 03:06AM

Main British Car:
I really thought that I'd be an action figure by now!

authors avatar
Re: TA Heads for 300, 350 question
Posted by: DiDueColpi
Date: February 10, 2024 01:11AM

I totaly "getcha" Jim. I remember driving around with my dad as a young teen in his 58 Apache PU.
He would pull away from a stop in 2nd gear and probably never reach 2000rpm before clutchlessly shifting into 3rd.
Drove me mental!
One day he took me out in moms Mercury ParkLane, We pulled onto the freeway to Chilliwack and he let that thing go! That 428 hit 130 in no time. Best ride of my life. He told me that sometimes learning to enjoy going slow is more inportant,
Not sure that I agree, but I do now enjoy leisurley cruising.
However, I have a 735 horse 496 62 Impala SS 6 speed manual that the son in laws have never seen 2000 rpm in.
My Daughters know different.
Eric I agree. You have a light, traction limited car. Too much low speed torque is your enemy.
Adopting the British mentality is key, don't accelerate but rather "gather speed".
Remenber they have the Thrust SSC!
Live like you mean it
Fred


7sand8s
Dennis Miller

(36 posts)

Registered:
09/21/2008 10:47PM

Main British Car:


Re: TA Heads for 300, 350 question
Posted by: 7sand8s
Date: February 10, 2024 06:38AM

Eric pics of the head mod:
[www.v8buick.com]
Reply#428



Edited 1 time(s). Last edit at 02/10/2024 06:44AM by 7sand8s.


DiDueColpi
Fred Key
West coast - Canada
(1367 posts)

Registered:
05/14/2010 03:06AM

Main British Car:
I really thought that I'd be an action figure by now!

authors avatar
Re: TA Heads for 300, 350 question
Posted by: DiDueColpi
Date: February 11, 2024 02:04AM

Eric! Don't even consider reusing flat tappet lifters. It's just doom despair and misery.
Get a set of DLC coated lifters and live happily ever after.
I know that there are zinc additives out there that can change your life. But unless your an alchemist thats related to Merlin your going to be dissapointed.
Live like you mean it.
Fred


Airwreckc
Eric Cumming
RTP, North Carolina
(252 posts)

Registered:
05/28/2020 10:10AM

Main British Car:
1972 MGB-GT (working on a Sebring project) Buick 300-4 V8

Re: TA Heads for 300, 350 question
Posted by: Airwreckc
Date: February 12, 2024 09:27AM

Great advice Fred, thanks.



Airwreckc
Eric Cumming
RTP, North Carolina
(252 posts)

Registered:
05/28/2020 10:10AM

Main British Car:
1972 MGB-GT (working on a Sebring project) Buick 300-4 V8

Re: TA Heads for 300, 350 question
Posted by: Airwreckc
Date: February 12, 2024 09:52AM

Would the modification on the TA heads look like this? My engine is in storage and I'm looking for jobs to occupy myself until the real work can begin--or is it better to have the block to refer to? Also, forgive my ignorance, but is this modifications on both ends of the heads or only one side?
TA Rover Head corner modified.jpg


BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(6470 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

authors avatar
Re: TA Heads for 300, 350 question
Posted by: BlownMGB-V8
Date: February 12, 2024 04:28PM

That should do it. Both ends.

Jim


Airwreckc
Eric Cumming
RTP, North Carolina
(252 posts)

Registered:
05/28/2020 10:10AM

Main British Car:
1972 MGB-GT (working on a Sebring project) Buick 300-4 V8

Re: TA Heads for 300, 350 question
Posted by: Airwreckc
Date: February 12, 2024 04:40PM

Great, thanks Jim.


ag1234
Arthur Gertz

(71 posts)

Registered:
03/29/2023 08:26PM

Main British Car:


Re: TA Heads for 300, 350 question
Posted by: ag1234
Date: February 17, 2024 01:30PM

A little less than welding ? In that "problem" area, proper prep, maybe center punch dibits and aluminum filled epoxy ?


Airwreckc
Eric Cumming
RTP, North Carolina
(252 posts)

Registered:
05/28/2020 10:10AM

Main British Car:
1972 MGB-GT (working on a Sebring project) Buick 300-4 V8

Re: TA Heads for 300, 350 question
Posted by: Airwreckc
Date: February 17, 2024 06:55PM

Fred, that's what I'm thinking. I found several high temperature epoxies, What do you suppose the maximum temperature rating for the epoxy should be? I found one that is rated to 300F and is supposedly extremely hard (probably can be machined). I found some others that are aluminum and steel filled with 350F ratings.
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