what the differance of a 305 from 78 nova and a 305 from 78 buick ??any??what auto ****** would they come with???
In the late 70's GM was putting Chevy engines in Buicks and Oldsmobiles and Olds engines in Pontiacs. They were putting Buick 231 V-6's in almost everything and had 4 distinct 350's for Chevy, Buick, Olds and Pontiac so I'd say for anyone not "of age" back then it's not a dumb question. In the case of the 305 though they were the same engines, if it had an automatic the trans could be a TH200 (JUNK), a TH250 (almost as bad) or a TH350. There didn't seem to be any logic to what got what trans back then and all 3 are very similar in outward appearance. There are some differences to let you ID the trans but I don't recall what they are.
The TH250 looks like a TH350 but it has a band adjustment bolt just behind the bell housing, Don't let some one tell you it's a 350 if it has that. A 350 band is only used for intermediate (manual second), it uses three clutches behind the pump for intermediate gear , while the 250 uses that small band.
Don't forget that internally the transmissions are the same, but a BOP trans will not bolt up to a chevy motor, and vice-versa. The exception is the 200R4 trans, which had dual bolt patterns on the bell housing.
I worked with a man who bought a full size chevy wagon. He moaned over and over that it had a Pontiac "305" in it. It's the only time I've heard of one. But another guy bought a new Buick and was sore as hell that it had a Chevy under the hood. I bought the driveline out of a 73 Omega. 250 I6 with a turbo 375 behind it. Strange things were going on back then. I think GM was trying to standardize their engines by having a "Corporate" line, rather than individual brands. Which went totally against their marketing practices in the past.
ID the ****** by hunting up a ****** pan site that has pic's of all of them. Easy way to do this. pdq67
There's no difference, they're both poorly designed, under powered, short lifespan oil burning engines done in true GM style.
"Corporate" 305 motor (a SBC). The trans could be almost anything as mentioned above. BUT, the metric 200 is finding favor a****st the stock cl*** drag racers, and they can be built to handle power. Butch/56sedandelivery.
Seems like it was a one year only deal from what i heard on the dual pattern thing.Its funny how even though GM used several different transmissions in the late 70's early 80's they kept the other stuff the same .I once had a 307 Olds with a 2004R (overdrive with the lockup convertor) that went to ****.I got a BOPC pattern T350(non lockup) from a wrecking yard to replace it.It bolted right up and the flexplate had another set of holes for the different convertor pattern .Even the driveshaft was the same length and the yoke had the same spline .All i had to do was silde the crossmember forward a bit to make up for the T350's further forward rear mounting point and drill new holes in the frame.Was one of the easiest conversions i have ever done .Even the cooling lines were the same size ,i just had to rebend them a bit to make them line up ...
GM did some weird stuff back then as I have seen the TH350 behind V6s and the smaller trans behind V8s.
I bought a '78 Buick Skylark brand new. It came with a disclaimer that the V-8 engine could have been from another GM division, and could have been manufactured in Canada.
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