I am in the middle of a swap now I am using the 3RZ and W56 in cruiser frame. I just pulled my engine and all the stuff I need from the donor taco. I have the FSM coming in this week and I am about to dig into the harnesses and try to eliminate the circuts I do not need for the cruiser.
BigMike seems to be the man on the 3RZ swaps. I have read and re-read his swap posts before I decided to go this way I was originally going with a LT1 and 700R4, but I am shooting for real light weight (or as light as I can get that heavy pig)