91 camaro wiring

I got a 91 camaro rs 3.1 v6 and i want to put a 4.3 v6 in my car i got the motor and wiring harness anybody know how to wire it in the car

did you get the ecu? I think you need that as well.

the motor and the wiring harness and the ecu came out of a 94 s10 blazer