Diesel to gas?

[rs74]

Throwing around the idea of taking the 6.2 out of the 84 shortbed and going back with a 350. The 6.2 runs pretty good but smokes like a freight train. While I like the 20 mpg when I drive it I think I would like driving a gas short bed again better. Other than flushing the fuel tanks and lines out I don't think I would have to change much with the fuel system. I believe the engine frame mounts are the same but not sure what I would run into on the wiring harness. If I were to make the switch I would make sure it had the AC put back on. Can I use the Diesel harness or do I need to do something different? The truck has a 700r4 so I think I could change the converter and the governor and be good. Anything else I need to think about?