We're working on a new project and I need some help. What we're doing is we are taking a 1985 GMC 3500 that currently has a 6.2L diesel in it, and we are wanting to drop an 89 Cummins 12 valve into it. Does anybody know where I can find an adapter plate to hook the engine to the current Muncie 4 speed that is in the truck. Thanks for any help.....*****

 

Try these guys :

http://www.advanceadapters.com/

 

The adapter you are needing is original equipment on many step-vans built on GM chassis and powered by 4BT and 6BT Cummins.

It should be a Cummins part.

Also, check this out.

www.Cummins-Conversion.com

 

Thanks for the site, but I couldn't find anything there. Anybody else have any ideas

 

Thanks, That helps a lot.

 

This might be a stupid question, but is there a site where I could order it if it is a Cummins part.

 

Try a Cummins parts dealer near you or these guys:

www.hoeslidiesel.com

I have always recieved great service from them.