Re: 727 W/ 904 internals
 

If I may........J. W. Transmissions in Rockledge, FL makes the "Ultrabell" as one option. It's basically an SFI certified flywheel shield as well as an adapter available in quite a few configurations.
I couldn't help but wonder if NHRA could be petitioned for its acceptance in Stock and/or SS based on its safety qualities, as long as a corporate trans is used. (If it hasn't been tried already.) GM and Ford appear to have the luxury of interchangability of their big and small transmissions between big & small blocks. It would save some money over 727 cases with 904 internals.

Re: 727 W/ 904 internals
 

Been there done that!!!!!!!!!!! First asked div. passed me on to national both said not yet ...wanted to use 904 with ultra bell for stock in my big block combo,, I do think if more people would call and ask it would help,, it would be a safety issue also the ultra bell is sfi approved..bryan d stk5010

Re: 727 W/ 904 internals
 

The rules regarding the case being OEM would have to be changed I dont think that should happen in stock, maybe Superstock.

Re: 727 W/ 904 internals
 

When we bought the White 73 Roadrunner 6 or 7 years ago it

had the 904 with adapter mating it to the 440. It had been raced

for several years in stock with it and apparently never had a problem.

I did not ask anyone or say anything about it ................ I just removed it!

Phillip: I will go over to shop tomorrow and let you know

who manufactured the unit. It has the trans bell housing machined

off and replaced with a bolt on bell housing with big bolt pattern

adapter and requires no spacers or special flexplate but uses

904 converter of course.

Re: 727 W/ 904 internals
 

Oh, I was thinking something more like a midplate adapter.
Why is that the fords and chevys get to use the small transmissions and we have to go thru so much hassle?

John, I need a converter for the 340. pm me if you have anything good for sale. My faithful old Dynamic came apart last weekend at Ashcroft.

Re: 727 W/ 904 internals
 

Its a bolt pattern change thats not legal.

Re: 727 W/ 904 internals
 

Bob,
On another thread someone stated that the FE bellhousing's have to be cut and welded to make a c4 work, Is this true?

Re: 727 W/ 904 internals
 

Havent got there yet, if so then a pro trans C6 - 904 is in order, Alex D could answer that for sure and I saw another c-4 post that I will have to go read but the chevys have it made.

Re: 727 W/ 904 internals
 

Phillip, From what I just read you need an adapter for a c4 to FE, there is a sheild bolt on that works but than thats a gray area.

Re: 727 W/ 904 internals
 

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