I have a 95 f-150 with a 300 6 and a 5 speed. I friend of mine has a 400 motor witha automatic. IF we were to put this in my truck what would it take. the 400 is carburated and mine is fuel injected. do they make a auto shifter for the floor and is there any difference in the computer. it would be coming out of a van so we can get the radiator and whatever out of that. thanks for any info