MGBV8 Carl Floyd Kingsport, TN (4511 posts) Registered: 10/23/2007 11:32PM Main British Car: 1979 MGB Buick 215 |
Re: Blueprints for the Pontiac and Chevy bell housings
Couldn't find anything on the 'net. Many years ago Dan LaGrou displayed the actual GM blueprints for the 215 engine.
Here's the Forum to ask: [www.cnczone.com] |
BlownMGB-V8 Jim Blackwood 9406 Gunpowder Rd., Florence, KY 41042 (6468 posts) Registered: 10/23/2007 12:59PM Main British Car: 1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS |
Re: Blueprints for the Pontiac and Chevy bell housings
That Pontiac pattern would be the old BOP that the smallblock Buicks used. 300 Buick and early Buick V6, I think the Mark I and II engines.
Jim |
Re: Blueprints for the Pontiac and Chevy bell housings
That Pontiac pattern would be the old BOP that the smallblock Buicks used
No, the starter is on the driver side, it's Pontiac ( you'll notice that the print mentions 389 and 421 ) specific. That's why I made a point of noting that, the Buick / Cadillac starter is on the passenger side and is NOT oriented the same as the O / P starter so you can't just flip the pattern 180 degrees through the vertical axis and make it work. That's why dual pattern bells have starter kickouts on both sides of the bell. ( got rid of some inaccurate info that Joe hit me with a clue bat for ) Edited 2 time(s). Last edit at 01/01/2015 10:07PM by Todd McCreary. |
joe_padavano Joseph Padavano Northern Virginia (156 posts) Registered: 02/15/2010 03:49PM Main British Car: 1962 F-85 Deluxe wagon 215 Olds |
Re: Blueprints for the Pontiac and Chevy bell housings
The Pontiac drawing above is the old, pre-1964 Pontiac bellhousing, NOT the BOP bellhousing. All of the 1964-up motors have the starter bolted to the block, not the bellhousing. Only the FWD TH425 (Toro/Eldo) trans has the starter bolted to the bellhousing, and that's only because the design of the trans precludes the use of the normal block-mounted starter.
Also, only the Buick V6 motors through the 3800 Series I family use the BOP bellhousing. All Series II/III motors use the 60 degree metric bellhousing (yes, even in RWD applications) that was originally used on the Chevy 2.8L V6 motors. |
Re: Blueprints for the Pontiac and Chevy bell housings
That's good information Joe, thanks.
Don't suppose you'd have the Rover or standard BOPC patterns, would you? |
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BlownMGB-V8 Jim Blackwood 9406 Gunpowder Rd., Florence, KY 41042 (6468 posts) Registered: 10/23/2007 12:59PM Main British Car: 1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS |
Re: Blueprints for the Pontiac and Chevy bell housings
There is also one which only has the starter bulge on the right (as in photo above) for Buick engines such as the 300, 340, 350, 400, 430, 455 and early V6. The double bulge bell can be used in an MGB by sawing off the bulge on the left, as we did in the MG-Roadmaster. If desired it can then be closed off by TIG welding a plate over the gap but is not required by any means. These bellhousings can generally be picked up for somewhere around $50-$100 and are pretty common. The early V6 also has a cable operated clutch version, I believe the cable comes in from the front which means that the pivot bolt would be on the opposite side. That might be useful for a slave cylinder mounted back beside the transmission.
Jim Edited 1 time(s). Last edit at 01/01/2015 11:43AM by BlownMGB-V8. |
mgb260 Jim Nichols Sequim,WA (2461 posts) Registered: 02/29/2008 08:29PM Main British Car: 1973 MGB roadster 260 Ford V8 |
Re: Blueprints for the Pontiac and Chevy bell housings
The 75-80 H body cable V6 bellhousing with slave is what Mike Moor did on his. Very nice setup, a lot like the Ford version.
Edited 1 time(s). Last edit at 01/01/2015 12:09PM by mgb260. |
mgb260 Jim Nichols Sequim,WA (2461 posts) Registered: 02/29/2008 08:29PM Main British Car: 1973 MGB roadster 260 Ford V8 |
Re: Blueprints for the Pontiac and Chevy bell housings
There are dual pattern Chevy/BOP bellhousings. 76-81 GM midsize and Camaro with Buick 3.8. The bottom 2 bolts and dowels are the same. Transdapt has inexpensive adapters to go back and forth also. The GM 2004R also has the dual pattern. Here is a pic of the 2004R, can't find a pic of the manual one but have seen it.
Edited 1 time(s). Last edit at 01/01/2015 04:33PM by mgb260. |
Re: Blueprints for the Pontiac and Chevy bell housings
Got authorized into the Speedtalk forums and picked up the BOPC pattern. Added to first post.
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