Awesome response! Thank you!It sounds like you're retrofitting the 351W into your '83? In that case I would choose an engine harness and matching computer that best suits your needs. One option might be to use a Fox body harness with GUFB strategy EEC-IV (A9L, A9P, A3M1, X3Z, etc.). Another option would be to use a modified SN95 Mustang harness with CBAZA strategy EEC-IV. Yet another option would be CDAN4 using a '96-97 Crown Vic/T-bird/Grand Marquis harness and EEC-V.
Each system has its pros and cons. EEC-V has the benefit of integrated EDIS8, 4R70W transmission control, and generally better programming. CBAZA and GUFB are proven performers that can be retrofitted with EDIS8 with an external module if needed. GUFB has no 4R70W control possibility, though.
To answer your question however, I would not run the F-250 EEC's. The harness might be useful for customizing the harness you will make your own for the '83.
If it helps, I am running a TKO600 so I don't need an automatic ECU / harness.
For the most part, could I "plug and play" an A9L / A9P into my harness and get things to work?
I have wired, from scratch, 100 motorcycles (all carbed stuff) so I am comfortable wiring, I just have never tackled an EFI car before.