Engine and Transmission Tech

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

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mgb260
Jim Nichols
Sequim,WA
(2463 posts)

Registered:
02/29/2008 08:29PM

Main British Car:
1973 MGB roadster 260 Ford V8

Re: 4.5/4.9 Cadillac V8
Posted by: mgb260
Date: March 03, 2024 12:26PM

More interest in a MGB swap here:

[www.mgexp.com]


ag1234
Arthur Gertz

(69 posts)

Registered:
03/29/2023 08:26PM

Main British Car:
Re: 4.5/4.9 Cadillac V8
Posted by: ag1234
Date: March 03, 2024 03:18PM

Did I mention Honda H23 rods and Toyota R22 pistons ? Boring/honing wet cylinders much easier/cheaper.( lathe and horizontal hone). Mod SBF hedders to fit. A better aluminum head is on the way.
Onward, Art.


mgb260
Jim Nichols
Sequim,WA
(2463 posts)

Registered:
02/29/2008 08:29PM

Main British Car:
1973 MGB roadster 260 Ford V8

Re: 4.5/4.9 Cadillac V8
Posted by: mgb260
Date: March 04, 2024 12:53PM

Art this page has some info on porting and blocking the heat riser on the center exhaust ports, On a very high performance build I would add steel inserts for the head bolt threads and rocker support threads. Art, are you making heads or using Rover heads with a deck plate and using your roller cam? If the later I think you would have to eliminate the distributor and use crank trigger ignition. Megajolt? Very curious as to what Jack Collins comes up with, on putting one in a MGB.

[forums.24hoursoflemons.com]



Edited 2 time(s). Last edit at 03/05/2024 12:45AM by mgb260.
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Airwreckc
Eric Cumming
RTP, North Carolina
(250 posts)

Registered:
05/28/2020 10:10AM

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

Re: 4.5/4.9 Cadillac V8
Posted by: Airwreckc
Date: March 05, 2024 08:24AM

I'm sure there's been something in this thread that speaks to the potential advantage of this over a Rover or Buick 215 build. I'm especially curious about this vs. a stroker Rover 3.5, as I will have some parts left over from my stroker Buick 300 build (crank, heads, 4BBL intake, etc.), and also have a spare Rover 3.5. I saw mentioned the possibility of using Rover heads on this Caddy block--would the 300 heads also work? Mostly curiosity at this point, but who knows.


mgb260
Jim Nichols
Sequim,WA
(2463 posts)

Registered:
02/29/2008 08:29PM

Main British Car:
1973 MGB roadster 260 Ford V8

Re: 4.5/4.9 Cadillac V8
Posted by: mgb260
Date: March 05, 2024 11:40AM

Eric, The advantage is to the Cadillac motor. The aluminum heads are lighter and breathe better than the iron Caddy heads. I think it could be done with a special reground cam because the valve arrangement is different. It would be unique.


Airwreckc
Eric Cumming
RTP, North Carolina
(250 posts)

Registered:
05/28/2020 10:10AM

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

Re: 4.5/4.9 Cadillac V8
Posted by: Airwreckc
Date: March 05, 2024 01:59PM

Jim, got it, thanks.
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