4l60e transplants?

I'm going to use an aftermarket controller, so I want to retain electronics. It'll be behind a 5.7 hemi with efi, so the new technology is sort of a theme ;) I have no issues with running a 4l80e, they are unbelievably stout, but from what I understand they are bigger than the 60's and tunnel modification is already going to be a chore. Keisler rates their modified 60e at 650 ft.lbs, which is just about what I want to run. It'll be a street car as well, no drag racing, just tight turning. With their trans I can paddle shift and have engine braking as well, all the while being able to turn it all off and let it shift itself when I'm just cruising. It's exactly what I want!! EXCEPT I want to use that floor console. Can anyone inform me of just what the floor console material actually is? My car was a 3 speed auto column shift, so I will have to find a console to put in it anyways, but if the material is just like a plastic I could probably just cut it to fit around the new tunnel. Any thoughts?

Thanks,
Ryan

P.s. I'll post up some pics of the car in the members restoration thread fairly soon once I get my suspension from bill and get it installed so the car is on the ground.

I've done a couple of the Keisler trannys in B-bodies. I can't tell you what it would take to put one in an early A. They both replaced 904s behind some thumping small blocks and were more than up to the task. Shafi Keislers 3rd gen hemi powered Cuda runs this trans and he beats the dickens out of it. I've put 4l60E's behind some really happy LS motors and they haven't let me down yet, so I don't think you will have a reliability problem. If you're not pushing really big horsepower (800?) and doing 9 second passes every weekend, I wouldn't consider the 4l80 and option for the amount of surgery required to the trans tunnel. I hope this helps, it's just what I've learned so far....