Finding a 60 pin OBD-I computer that supports the DPFE EGR feedback (versus positional/EVP) on the '96 engine may not be possible. This is not a plug-n-play swap at all. It is doable but there are a few things to figure out.

 

Sourcing a 60 Pin PCM from a 6 cylinder truck with the same transmission (assume E4OD) would be the easiest putt here. The next problem to overcome is the EGR feedback.

The extra connector is most likely the output shaft sensor from the 4R70W transmission that was probably behind the '95 5.0L engine. The E4OD on the 6 cylinder does not have one. There may be some wiring differences in the transmission pins between the two model transmissions, like which pins control the solenoids, converter clutch, etc. They may not be in the same position.

 

Well he has the complete 6 cyl donor truck SO I think he is going to swap the harness

 

Ok so what year was the donor?

 

Original truck 95 302 auto 4wd

Donor truck 96 300 auto 4wd

 

There "may be" a few caveats there but the good side is he has a complete donor.

Remind him to change out the CANP on the '95 truck with the Vapor Management Valve from the donor. Another gotcha!

 

What is that?

 

Canister Purge valve...it is triggered to pull the vapors out of the charcoal canister from the fuel tank. OBD-II uses a fancier version called a Vapor Management Valve.

 

I'm just looking up diagrams, and I forgot to ask, is it SD/ MAF/CALI for each one

 

They were both MAF

 

So if both MAF, then no DPFE EGR. Correct?

 

The '96 engine has DPFE EGR feedback. The '95 most likely does not. Cali trucks may have it.