Alright well i'm new to this site, but anyways i am swapping motors in my truck. 4.9 to the 5.0. i know it isn't a big difference. the 5.0 is out of a '90 and my truck is a '92. is there a different wiring harness from '90 to'92 for the 5.0? my dad and have been looking at my truck to the truck i just bought and we noticed that the wiring is completely different running into the cab.we know the computers will need to be swapped to but what we wondering is that will the '92 5.0 wiring from the motor plug right into mine? maybe then i can go to a junkyard and buy one so that we don't have to tear out my dash. any input on this is greatly appreciated.

 

For one thing, you are going from 6 fuel injectors to 8. They need control leads back to the computer.
The distributor is in a different location, the coolant sensor is in a different place etc.

 

I replied to your thread in the Engine forum, but you'll find a lot more info about your pre-'97 truck on FSB.