[Jim85IROC]

The wiring harness won't be too bad to get into your truck. The engine harness is pretty much self-contained... all of the vehicle wiring was on a separate harness, so as long as you mark what all of the connectors are for (assuming you're not familiar enough to identify them without tags), running and hooking up the harness shouldn't be too bad.

You'll need a MAF unless you convert the system to a speed density system, which is a complete waste of time on the 305. As long as you're buying a new MAF, get a Wells SU145. It's a much more reliable unit than any other brand because it doesn't use the original thin-wire format, but the newer style like you'd find in an LT1 MAF.

One thing I would suggest is to toss a somewhat bigger cam into the motor before you install it. The 86 & up 305 TPI cars that were mated to an auto trans got the "peanut" cam which is garbage. The 5 speed cars got the same cam that the TPI 350s got, and it completely transformed the motor.

If you want any additional info on TPI motors, feel free to PM me, or check out thirdgen.org. They'll have more TPI info than you could ever hope for.