BOP adapter plate?..th350 and th400 same bolt pattern???

[monte87LS]

Hi, I putting a GN motor in my 87 Monte, Im making it mostly a track car but I'l still be driving her to car shows and cruizes...Im using my built th350 trans with my GN motor, I found a BOP adapter plate but I just wanted to make sure it will fit, the member selling it used it for adapting his GN motor up to a th400 trans, doesnt the th350 and th400 have the same bolt pattern, I have the chevy bolt pattern on my th350, I just wanted to make sure before taking my motor and trying to bolt it up, Id hate to be stuck in that situation, any info will help, thanks

 

[stangbangin69]

to my knowledge they are the same bolt patterns.

 

[Scott Atk]

Sounds like it will work. To me a better option especially since you're building a track car would be the JW Ultra Bell. It would solve your adapter problem plus give you the flexplate protection required by NHRA tech.

 

[monte87LS]

Sounds like it will work. To me a better option especially since you're building a track car would be the JW Ultra Bell. It would solve your adapter problem plus give you the flexplate protection required by NHRA tech.

JW Ultra bell?...what is that?...where do I find it?..how much?...Ive got a few days of searching to do before the project begins so I'd like to research all my options

 

[Scott Atk]

%22ultra+bell%22 - JEGS High Performance

The way it works, you basically saw off your bellhousing and bolt the Ultra Bell directly to the front pump of the tranny.

 

[monte87LS]

...nahhh I think Im just going to stick to the BOP adapter plate, thats just a little too much me to handle right now in my life..lol..thanks for the info ,now I know about it at least for the future

 

[Nordbert]

I'd put the Chevy internals into a BOP case if money is an issue. Very easy if you can find one.
BTW, is your Chevy case a lockup or non-lockup?