stock class rear axle?

[Lyn Smith]

Rod, you could use a 57 -64 Pontiac/ Olds rearend housing if you wanted to retain the stock look. It is not legal to make the stock rearend narrower plus the tires will be up against the springs if you do. A cheaper alternative is finding a 8.5 out of a Camaro or Firebird. Just as strong as a 12 bolt, but not as many ratio options.

[Mark Yacavone]

Better reconsider the 12 bolt ,with Pro gears, if it's going to be a stick car.

Pontiac/ Olds not legal in Stock

[e vassar]

Originally Posted by Mark Yacavone

Better reconsider the 12 bolt ,with Pro gears, if it's going to be a stick car.

Pontiac/ Olds not legal in Stock

X2 What Mark said

[XSTOCKER]

The Olds/Pontiac rear is not acceptable for a Stocker trifive......I asked.

[Glenn Briglio]

Originally Posted by XSTOCKER

The Olds/Pontiac rear is not acceptable for a Stocker trifive......I asked.

Why?

[jmantle]

REAR END Original rear end may be replaced with another from the same automobile manufacturer; truck rear end prohibited. Aluminum center section permitted only on vehicles that were originally equipped with same. Distance between backing plates may not be changed. Any gear ratio that fits third-member case or housing permitted. Limited-slip or ratchet-type rear ends permitted.

So a COPO comes with a 9" Ford so I guess a 9" Ford is now legal?

Jim Mantle V/SA 6632

[Bobby DiDomenico]

Originally Posted by jmantle

REAR END Original rear end may be replaced with another from the same automobile manufacturer; truck rear end prohibited. Aluminum center section permitted only on vehicles that were originally equipped with same. Distance between backing plates may not be changed. Any gear ratio that fits third-member case or housing permitted. Limited-slip or ratchet-type rear ends permitted.

So a COPO comes with a 9" Ford so I guess a 9" Ford is now legal?

Jim Mantle V/SA 6632

Often wondered about that Jim.

[XSTOCKER]

Originally Posted by Glenn Briglio

Why?

What Jim said. Tech Director said, must be Chevrolet.
And a big no on the 9". Asked about that one last year.

[FED 387]

9 inch only on COPO -Cobra Jet and Drag pac is the way I understand it--I think NHRA had a post on what vehicles can use a 9 inch-FED 387

[Ed Wright]

Originally Posted by XSTOCKER

The Olds/Pontiac rear is not acceptable for a Stocker trifive......I asked.

That is silly. A ‘57 Pontiac is a bolt-in deal. Only driveshaft shorter, with larger U-joint on the back. Not faster, just less breakage. I ran a ‘56 Chevy 9 passenger wagon in MP, before ever running Stock. The Olds rears needed some work. They came with coil springs in the back.
When I made the wagon a Jr Stocker, I ran the Pontiac rear, not one Tech guy ever noticed. When I went to the sedan the next year, I kept the Chevy rear end. Not nearly as nervous if a Tech guy looked under it. Pontiac rear could be no faster, just more heavier, and less starting line breakage. They looked much alike from the back, Pontiac was a little larger. For a whole season, nobody noticed.