Consistency

[Steve L]

I know this isn't a bracket site but I also know this is where the info is. Question: 70 Pontiac Lemans,350 c.i. built similar to stock rules, is a powerglide or a turbo 350 more consistant ? Also,car came with a b.o.p. 10 bolt. Is this rear worth putting any money in, or should I go with a 12 bolt ? I'm planning on trying stock in the future so I don't want to spend money where it's not needed. Car is not tubbed and is still in the building stage.It's basically a street car now torn down and getting cleaned,painted and ready for the strip.

Steve

[Adger Smith]

I would take a long hard look at where you are going with your project & build with parts that will suit your later needs. Some cars never came with a P/G & only a 3 speed is allowed in those classes. No sense spending double.
my .02 for what it's worth

Adger Smith

[Steve L]

Thanks for the response Adger. I thought some of the 350 engine cars came with the powerglide. If I'm wrong let me know. Thanks

[Mark Yacavone]

Originally Posted by Steve L

Thanks for the response Adger. I thought some of the 350 engine cars came with the powerglide. If I'm wrong let me know. Thanks

Sorry bud, but you stepped into one of my pet peeves.

Pontiac did not use a Powerglide transmission, ever. Neither did Buick or Oldsmobile.
They did use a planetary two- speed known as the Super Turbine 300 ,or the Jetaway, depending on the brand. The only thing that's the same as a PG, is the gear ratio (1.76 PG) . The BOP trans is a stronger unit than the PG in stock form, but it never had any aftermarket support.
Calling one of these 2- speed transmissions a Powerglide would be no more correct than calling it a Fordomatic or a Powerflite.

Now , for your question. Put a Turbo 200 3 speed in it and look for a Chevelle , Monte Carlo or 70 GTO 12 bolt in it in case you ever want to use a 4.33 ring and pinion.

[Tom keedle]

Originally Posted by Mark Yacavone

Sorry bud, but you stepped into one of my pet peeves.

Pontiac did not use a Powerglide transmission, ever. Neither did Buick or Oldsmobile.
They did use a planetary two- speed known as the Super Turbine 300 ,or the Jetaway, depending on the brand. The only thing that's the same as a PG, is the gear ratio (1.76 PG) . The BOP trans is a stronger unit than the PG in stock form, but it never had any aftermarket support.
Calling one of these 2- speed transmissions a Powerglide would be no more correct than calling it a Fordomatic or a Powerflite.

Now , for your question. Put a Turbo 200 3 speed in it and look for a Chevelle , Monte Carlo or 70 GTO 12 bolt in it in case you ever want to use a 4.33 ring and pinion.

68-72 12 bolt chevelle/70-72 monte carlo rears will be a bolt-in (bring checkbook)
64-67 chevelles are an 1.5" narrower(bring 2 checkbooks)...
if you are not going class racing,i'd stick a 9" in it.
it'll be cheaper in the long run...

[Alan Roehrich]

Originally Posted by Mark Yacavone

Sorry bud, but you stepped into one of my pet peeves.

Pontiac did not use a Powerglide transmission, ever. Neither did Buick or Oldsmobile.
They did use a planetary two- speed known as the Super Turbine 300 ,or the Jetaway, depending on the brand. The only thing that's the same as a PG, is the gear ratio (1.76 PG) . The BOP trans is a stronger unit than the PG in stock form, but it never had any aftermarket support.
Calling one of these 2- speed transmissions a Powerglide would be no more correct than calling it a Fordomatic or a Powerflite.

Now , for your question. Put a Turbo 200 3 speed in it and look for a Chevelle , Monte Carlo or 70 GTO 12 bolt in it in case you ever want to use a 4.33 ring and pinion.

Sorry Mark, but you are wrong. At one point, in the early seventies, there was a major fire at the plant where the 350 was built. GM made PowerGlides with multi fit cases to be installed in the place of the 350 transmissions in all GM cars. I actually had one of those transmissions in a circle track car, a Pontiac Grand Prix with a 400 Pontiac, later a 428 Pontiac, and finally a 455 Pontiac. The case was a genuine GM PowerGlide case, and would bolt to a Chevy, a Pontiac, a Buick, an Oldsmobile, or a Cadillac, with no adapter. I had to have the case because there was a rule that stated no adapter could be used.

[Mark Yacavone]

Originally Posted by Alan Roehrich

Sorry Mark, but you are wrong. At one point, in the early seventies, there was a major fire at the plant where the 350 was built. GM made PowerGlides with multi fit cases to be installed in the place of the 350 transmissions in all GM cars. I actually had one of those transmissions in a circle track car, a Pontiac Grand Prix with a 400 Pontiac, later a 428 Pontiac, and finally a 455 Pontiac. The case was a genuine GM PowerGlide case, and would bolt to a Chevy, a Pontiac, a Buick, an Oldsmobile, or a Cadillac, with no adapter. I had to have the case because there was a rule that stated no adapter could be used.

Alan ,I know that . I've seen them. .........I'll take a couple . Could you send them to me?
Thanks for confusing the issue .Now all the 2 speed Tempests and GTO's on Ebay can still claim they have a Powerglide in them.

How about Canadian Pontiacs? Transaxle Tempests? Technically a PG, I guess.

Hey everybody , Alan is right. Mark is wrong .Got it?

[Bob Mulry]

Hey Mark,

And don't forget that the SuperTurbine 300 had a TH400 size output.

Bob

[Alan Roehrich]

Originally Posted by Mark Yacavone

Alan ,I know that . I've seen them. .........I'll take a couple . Could you send them to me?
Thanks for confusing the issue .Now all the 2 speed Tempests and GTO's on Ebay can still claim they have a Powerglide in them.

How about Canadian Pontiacs? Transaxle Tempests? Technically a PG, I guess.

Hey everybody , Alan is right. Mark is wrong .Got it?

Mark, I don't have any, I got mine from my friend Jim Beattie at ATI.

I didn't confuse anyone any more than you did. You said NEVER. That was not correct.

Don't take it so personal. Got it?

[Dave Ribeiro]

Steve,

As Adger said stay as close to stock as possible..I do think they came with T-350, and yes the T-350 is the way to go...I would leave the tubs STOCK, don't touch them..You can still get a 30X9"
radial slick in there on a 10 "rim,with the right off-set....They made two 10 bolt rears, 8.2 and 8.5..The 8.2 is not very strong, but the 8.5 is what I use in my firebird and can handle a 455ci motor if set-up with good parts.You do need to decide if this is a race car or a street car ???? Good Luck Dave...1033/stock( 350)