Probably air stuck in the system. Was it purged correctly? When replacing the coolant you have to get the air out by running the motor with the radiator cap off until you see it purge a bunch of air out. Once it stops shooting out air bubbles you refill it, put the cap back on, let it cool, and...
Steering column from an automatic truck, ECU from an automatic truck (if EFI), and probably the driveshaft from the automatic truck. Frankly, not worth it. The autos fail too easily anyways. Just find someone to rebuilt it or look further away for a standard.