Aubrey's 62 409 goes 11.067 in C/S

[treessavoy]

Aubrey,

Back in the day I seem to remember the chevy guy's putting the Olds or Pontiac rear ends in their cars.....don't know if this is a viable option anymore, I'm sure no one makes the gears and parts.

My tri-power '58 Pontiac has one beefy rearend in it!

Jim

[bill dedman]

Jim,

I know the '57-up Olds/Pontiac rear ends were really strong units. I just wonder what the diameter is of the ring gear.

Anybody remember that dimension?

Just curious....
Bill

[treessavoy]

Originally Posted by bill dedman

Jim,

I know the '57-up Olds/Pontiac rear ends were really strong units. I just wonder what the diameter is of the ring gear.

Anybody remember that dimension?

Just curious....
Bill

Bill,

I don't remember either but those rear ends went into a lot of gassers at the time. There are probably gear sets floating around at swap meets.

Jim

[Alan Roehrich]

Until recently, Strange, and even Mark Williams had stuff for the Olds/Pontiac rear end. However, if you are going to the trouble to change, change to the 12 bolt Chevy. I want to see that car go fast and go rounds. You've suffered enough, for a long time, to make it work, just get a 12 bolt in it and enjoy the car. You've earned it.

[Greg Reimer 7376]

Originally Posted by Alan Roehrich

Until recently, Strange, and even Mark Williams had stuff for the Olds/Pontiac rear end. However, if you are going to the trouble to change, change to the 12 bolt Chevy. I want to see that car go fast and go rounds. You've suffered enough, for a long time, to make it work, just get a 12 bolt in it and enjoy the car. You've earned it.

Dittos and mega dittos.

[Ken Haase]

Pretty sure the 'late' Olds/Pontiac's are 9 3/8ths. Not too many ratio's to choose from.

Sure wish you were going to be at Spokane, Aubrey. I'd really like to see your '62 in person. Any chance of that?

[FED 387]

pontiac/olds dimensions 1.875 pinion dia----9.3 ring diam Comp387

[Aubrey N Bruneau]

I'll have the current rear end re-geared this week, Ken, and the car will be ready to go. No money for another big trip though. Next outing will be Edmonton, for the IHRA Rocky Mountain Nationals. Same exact weight... but dropping into D Stock ( because of a somewhat soft HP factor ).

As for the final solution for the rear end, yes, I would be more inclined to use an old Pontiac/Olds rear... but as has been pointed out, I don't think it fits within the way the rules are written.
So, for this season, I'll make sure I have a couple sets of 5.13's on hand.
However, I have come up with a bit of an "off the wall" idea ( I know, the car is already off the wall ) as a possible solution, which I will attempt to to put into motion this winter.
In the mean time, it's so off the wall, that I dare not mention it !

[Mark Yacavone]

Originally Posted by treessavoy

Aubrey,

Back in the day I seem to remember the chevy guy's putting the Olds or Pontiac rear ends in their cars.....don't know if this is a viable option anymore, I'm sure no one makes the gears and parts.

My tri-power '58 Pontiac has one beefy rearend in it!

Jim

You can't put an early Olds / Pontiac in a Chevy in Stock. Not a corporate rear.

[bill dedman]

Thanks for all the good info, guys.

Mark,
I don't know what NHRA's definition of a "corporate rear end" would be, but I'll bet you're 100-percent correct.

Bill