727 W/ 904 internals

[Mark Yacavone]

Originally Posted by Phillip marvetz

Well I guess it's like the pontiac guy's running the chevy bolt pattern transmissions, A little gringing and drilling is o.k with nhra. I guess if I weld a 727 bellhousing to a 904 case all will be fine. Time to fire up the spool gun

Phillip, can you give us a specific example of this?
I can't see the need for such a thing.

[Phillip marvetz]

Originally Posted by Mark Yacavone

Phillip, can you give us a specific example of this?
I can't see the need for such a thing.

Which point Mark? If it is the pontiac/chev trans you need look no further than a certian Firebird. They were protested a few years ago ( At Fallon I believe) and NHRA wouldn't do anything about it. Am I mistaken?.............

[Mark Yacavone]

Originally Posted by Phillip marvetz

Which point Mark? If it is the pontiac/chev trans you need look no further than a certian Firebird. They were protested a few years ago ( At Fallon I believe) and NHRA wouldn't do anything about it. Am I mistaken?.............

Any GM trans worth a crap was made in Chevy and BOP configuration ,or both.
There was even a BOP Powerglide case .
The Chevy pattern 904 mail truck trans isn't legal in S/SS, but still it bolts right up.
The 700R4 o/d is Chevy only, but nobody uses that.
I just don't know what issue you're talking about.
PM me if you want to.

[Adger Smith]

Mark,
The Chevy pattern Mail Truck 904 "is" legal in certain SS classes.

[Phillip marvetz]

Mark,
It's a fact that they were using a modified chevy case, Why? I don't know and don't really care. I don't have to run them heads up so it doesn't concern me.
What does concern me is that GM and Ford racers get to do something Mopar racers aren't allowed to do. The JW bellhousing to bolt a 904 to a big block costs about $400, A protrans is $4000-$5000. It doesn't make sense.
How many GM racers have had to throw away a repairable case because of a cracked bellhousing? This would be a good fix for them also. If NHRA is going to let the Ford racers use an adapter then we all should get that option. Right?

[Mark Yacavone]

Originally Posted by Phillip marvetz

Mark,
It's a fact that they were using a modified chevy case, Why? I don't know and don't really care.

PM me with the details... I'll investigate it.

Yes , I agree . Everybody gets an Ultra Bell...or nobody!

[Rory McNeil]

I have also seem many GM automatics that had both the Chevy and the "BOP" bellhousing patterns.

[Ed Wright]

Originally Posted by Adger Smith

Mark,
The Chevy pattern Mail Truck 904 "is" legal in certain SS classes.

Just the hood scoop cars, right?