I am thinking about installing one of the above trannies behind my Hemi in my 71 Challenger. I know there are guys out there that have done this. I was wondering what problems I will come across. What units do I need to be looking for? I found a A500 from a 98 Jeep wrangler, 318, will that unit work? I know I will need an adapter, but will that tranny work for a starting point? I also found a A518 out of a 99 Dodge 1/2 ton, 318. Anything I need to be looking for, and what NOT to look for? I also sent an email to SMR. Any suggestions out there you guys can throw my way would be great, thanks.