Update: Well we were getting ready to do the swap today when we compared wiring harnesses between the two engines. Nowhere near the same, all pins on the connectors are different from each vehicle and some pins are not on one engine but are on the other. Alternator plugs are completely different than my 83's. I guess a two wheel drive 80 model mini motorhome engine and mine will not get together.
What a shame, the 80 20r has had much engine work done to it including head work with new upgraded valves, rv cam, bored over, etc.
All the mechanical stuff might be the same but the wiring is a nightmare for me...
