Auto trans, which did you use?

At the very least to get the NAG 1 trans to work you need the rear wheel sensors. Basically the computer needs wheel speed information in order to determine shift points.

The only person I've seen getting the NAG 1 to work without taking everything from a donor car was this guy.

Read all the way through this guys thread. He has a tremendous amount of good information on transplanting the NAG 1 trans into an A-Body.

http://www.forabodiesonly.com/mopar/showthread.php?t=53074

Here's couple of pics of how he made his own sensor mounts for the transmission. Clearly getting a NAG 1 into an A-body is not for the feint of heart.