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i have a 95 3.8 and i wanna make it a 4.2 with some fully ported heads,cam,springs,roller rockers, and ported intakes. will the 95 mustang computer fire the 4.2 in the same order. do they both have the same computer. what all do i need to do this. crank,rods,pistons from a 4.2 or what.