Is all the splicing and soldering done between these 4 body plugs because if it is im having a hard time matching them up to eachother....any help is greatly appreciated. Thanks

 

Yes. There may be some to the ECU also

 

So...find the wire out of whatever engine plug I need and splice and solder into it with the 3.0 body wire?

 

When I done mine I left plenty of wire on the plugs and used wire nuts. Once you get it running with all the engine bugs worked out then solider the connections.

 

yes. Get the ewd for the 3.4 ecu, cruise control, a/c, 4wd, BUL (back up lights), and combination meter *gauges*. The ecu will require some basic wiring to get it to fire. BATT, B+, FC, and power to the injector side of the harness


My harnesses look something like this. The plugs vary by donor/ recipient. You'll have the 3.0 body plugs from 3.0 engine harness soldered to the 3.4 body plugs from the body with the one ecu to body plug from 3.4 donor and obd2 port. The yellow coil is the starter signal wire and green one is power lead for the obd2 connector.