I have 1996 3.0 225 efi. I have posted this question on scream n fly too. Ok I have spent hour or so going back n fourth on parts list by serial # and I dont find a difference. ECU same part #, fuel delivery system same part #, crank n piston assembly same part #. what make one have 25 hp more???? I could spend another hour or two compairing part #s but some one on here I know can tell me thanks.