95 to 91 wiring harness problem
 

I am putting a 95 inline 6 engine in a 91 body and the wiring harness is completely different how do I hook up the engine I have both harnesses

You haven't told us NEARLY enough for us to help. Click this, read the caption, study both trucks, and put ALL the '91's details into your signature:

https://www.supermotors.net/getfile/...oorsticker.jpg
(phone app link)

Post the '95's details, including whether it's MAP or MAF.