The only thing I would like to add is that if you use an older case and then use the electronic lock-up with the solenoid then wont the case still need to be modified for the lock-up solenoid wire ? I remeber the simple lock-up trans that use just the one feed wire that came in near the back of the trans looked to be a round hole in the case. And I think they were all the 904 style. Course the later ones with overdrive had the three wire oval plug and the the newer ones with electronic gov had the bigger hole for the extra wires. I am just thinking to myself the case would need modifying for the lock-up wire or wires if it was done with the electronic lock-up. Ron