Yes it is easy to put an A518 or A500 into a B or Ebody with minimal trimming to the trans ribs and a special transmission mount.

I posted a bunch of pics in this thread.

https://board.moparts.org/ubbthread...4/re-four-speed-overdrive-automatic.html


The OP was looking at putting an 8 speed into his car and was looking for option that didn't require cutting the tunnel.

To that end a question for roadrunninMark. Have you looked at the distance from the in/output shaft centeterline of the 8 speed to the bottom? The A518's are a bit thick on the bottom end. Will you have ground clearance after you drop everything an inch?