CRG Discussion Forum
Camaro Research Group Discussion => General Discussion => Topic started by: dab67 on June 23, 2006, 11:35:44 AM
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Anyone ever hear this term for a 350 or ever seen one? I've been told that in the 60's this was an engine put into Impalas. If so, what was the difference from the SB 350?
dab67
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No such thing as a "big-block" 350. Gen I small-blocks got as large as 400 cu. in., and the smallest Mark IV big-block was a 366 tall-deck block, used only in HD trucks (and useless as a performance engine).
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Dab,
I've always thought that "big block 350" was a misnomer for the Pontiac motors. Apparently, GM's Pontiac motors were configured differently from Chevy and Buick. I've also heard the Pontiac motor referred to as a so-called "medium block".
I used to have a 61 Impala SS. Some of the 60s Impalas did have a 348 motor with 350hp. Maybe that's part of the confusion.
Someone else would have to tell you if GM crossed over any Pontiac 350s to Impalas in the 60s. I do not know.
Phillip
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Ok since this is the case regarding "no big block" 350, is it possible to match up the rear end of the 350 sb with the bellhousing and flexplate from a Pontiac 400 and then install a powerglide to that? I'm fishing here as you can tell!!!!!!!!!!!!!!!!!!!! Was the Pontiac 400 flexplate larger than the 350 flexplate? Or am I really losing it!!!!! Ha!
dab67
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Or, can someone tell me the physcial difference between the Chevy power glide and the Pontiac power glide? And can you hook up a Pontiac powerglide to a sb chevy? ???
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The primary issue with Chevy/Pontiac Powerglides is the difference in bellhousing bolt patterns. They are significantly different and will not interchange without an adaptor and I seriously doubt that it would be worth the difference to tackle that project. Having said that, be aware that dual-pattern bellhousings do exist for some GM transmissions. If you are determined to use a Pontiac transmission behind your Chevy block it would be necessary to determine that a dual-pattern case was ever made for the 'Gllide, then locate one and swap the internals between the two. Sounds like waaay too much drama to make it worthwhile.
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I do not want to use a Pontiac tranny with my 350. All I want to do is find a dust cover to protect my flexplate and I can't find one!!!!!!!!!!!! I know I have a Chevy power glide with a small starter, and I know I have a 350 Chevy block. I just don't know what flexplate I have because i can't fine a cover to fit it. Do I sound frustrated????????? you bet!!!!!!!!!!!!!!!!! Thanks for the input CNroton. i will have the bellhousing checked to see if someone did flip flop parts. I am hoping no they did not.