904 band adjustment for a 408 stroker???

Yea, to take the lockup option out, i know i have some work ahead of me to do that, but I'd rather keep the lockup feature since I had the torque converter beefed up, unles it would need more fluid pressure to hold it in lockup due to the added hp's???...For the A 518 transmission conversion, wouldn't I have to cut the trans tunnel in a '70 Dart Swinger to fit it in the car? How about the overdrive part...wasn't there some solenoid that needed a switch on the dash to be flipped, or was that for lockup trans models only?? I'm kinda new to those aspects..