Chevy and BOP-C (Buick Olds Pontiac=Cadillac) blocks have different transmission mounting holes. Some transmissions (TH200-4R, for example) have a dual-pattern bellhousing, one that is drilled for either bolt pattern, but some transmissions are for one or the other. Call a trans shop in your area and ask them how to tell the difference - I believe the Chevy trans-to-block bolt bosses are closer together than those for a BOP-C trans.
Don't take this as gospel truth, but I do think that the 350 would fit on your 70 with little or no modifications. IIRC, the same frame was used for all A-body cars (excepting wagons and El Caminos) in any model year. Thus your frame may have mounting holes already drilled in it for an Olds motor mount.
Unless the Olds block is exceptionally tall or wide, it should physically fit in your engine compartment. Your accessories (alternator, power steering, A/C) may not be in the same locations as on the Chevy block, so longer wires/hoses etc. may be needed to connect them up to the Olds accessories locations.
Your carb may fit on both intakes - measuring the dimensions of the bases and the distances between the mounting bolts should tell you. If it does fit, though, it may not have a high enough CFM rating (cubic feet per minute, a measure of flow through the carb) for the larger demands of the 350. Does anyone have the formula for CFM ratings to hand?
I hope this helps, Dave.
wrote:
Thank Hoss,
That info was very informative. I didn't think of the brackets, I thought that since maybe I was transferring whole engines ... meaning I'm not taking anything off that's unnecessary, that it might be easier. But your saying that even though I would transfer the engine, alt, carb, distributor, and everything else that came from the Olds engine to the Chevelle, it still may not fit in the engine compartment correct?
I kinda wanted the new 4barrel and everything else connected to the 350, though I bought a 4 barrel intake for my 307 about 1 1/2 yrs ago and never put it on.
Again thanks for the info. I'll try to find out more specs on the 350 maybe that could help too! Anymore suggestions?
Thanx Hoss,
CharlesPS.
I wrote down your concerns like mounting holes and I'll check on'em immediately. I'm sorry, it was the distributor that he turned not the carb. I'm not too good with auto mechanic and sometimes get confused .... but gimme a PC and I'll show you something :)
-- www.swingvictoria.com
