what i would like to know is how the years are broken down. i just got an 87 miser truck,225/4spd o/d and the motor is locked up. what years are best/easiest fit without too much hassle please? it has a computer and was an a/c truck with p/s. son wants it for some reason. it is missing a couple a/c brackets along with the compressor. wiring is a mess but i have a wiring harness from an 87 v8 truck that should work out. i see on a few sites that they list stuff for like 81-87. what earlier years would be a good substitute. /6 is all new to me. it has a 1bbl carb on it now but i might like to use a 2bbl on it if i put it together. TIA. rick w.