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Old 06-29-2025, 10:08 PM   #1
MR DERBY CITY
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Default Re: Transmission Adapters

Hey YAC, open can, turn upside down?. Observe worms
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Old 07-02-2025, 03:36 PM   #2
jmantle
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Default Re: Transmission Adapters

Quote:
Originally Posted by GTX JOHN View Post
I wish there was an accepted adapter to use a
904 behind a Big Block Mopar.

There are adapters that we use in our bracket cars
but not NHRA approved (I do not think any are for Mopars).

Boy would that save us some money.
I have to wonder if anyone has approached JW for a 904 ultrabell. They do list one for the 727. There isn't a generous number of pump bolts on a 904 but it has as many as a 200 and I haven't had a bell fall off of a 200.
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Old 07-02-2025, 06:20 PM   #3
Ken Parkman
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Default Re: Transmission Adapters

Quote:
Originally Posted by jmantle View Post
I have to wonder if anyone has approached JW for a 904 ultrabell. They do list one for the 727. There isn't a generous number of pump bolts on a 904 but it has as many as a 200 and I haven't had a bell fall off of a 200.
There is supposedly one for sale locally which has nothing to do with me. Pat, now retired, was a big 904 proponent so it's possible he had some made by JW. The bolt pattern looks right, but can't say for sure.

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Old 07-03-2025, 11:05 PM   #4
GTX JOHN
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Default Re: Transmission Adapters

Quote:
Originally Posted by jmantle View Post
I have to wonder if anyone has approached JW for a 904 ultrabell. They do list one for the 727. There isn't a generous number of pump bolts on a 904 but it has as many as a 200 and I haven't had a bell fall off of a 200.
I do have an issue with the trans occasionally getting loose on the adapter on the trans on the 904.
It was in a 440 Roadrunner stocker that I bought. I removed it before
I got bounced back then some years ago. Probably would not make a difference
any more but I will not to care to chance it anyhow!
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Last edited by GTX JOHN; 07-03-2025 at 11:07 PM.
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Old 07-27-2025, 01:03 PM   #5
Coleydog
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Default Re: Transmission Adapters

Quote:
Originally Posted by GTX JOHN View Post
I wish there was an accepted adapter to use a
904 behind a Big Block Mopar.

There are adapters that we use in our bracket cars
but not NHRA approved (I do not think any are for Mopars).

Boy would that save us some money.
Well I think Cope just made a 727 SFI case-bell, why not a 904 case to big block bell? Maybe it is in the works since the bell is separate. No shield needed then! Then farther, make it so any PG or 400 vert could be used, endless possibilities right there. God I hate this spell check BS!

Last edited by Coleydog; 07-27-2025 at 01:10 PM.
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Old 07-28-2025, 12:40 PM   #6
340Cuda
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Default Re: Transmission Adapters

My understanding is that Cope has made a SFI approved 727 case with adapters for both big and small block Mopars.

I also believe that the 727 case will hold 904 guts, I think I read that.

I don't think he is actually selling them yet, still testing, but I would think soon.
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