a P75 is an integra RS/GS/LS ecu, they are cheap and plentiful, I suggested it because it is cheap... And hopefully you can get one from a friend to test it out.
The P61, I've seen run for 200 easily, and the dealer gets 600-800 or them. (The kid I did a swap for, bought one before consulting me!!!!!)
Good luck.
-PHiZ