I have a 1995 F-250, 4x4, w/ a 7.5L engine, A/C. I need to replace the alternator and would like to increase it's output. I found a couple of places that have 120 amp, and the Mean Green High Output. Is the Mean Green a drop in replacement? Does anyone know of a distributor that has high output altenators for the F-250 w/ 460ci engine, or maybe a dual battery system for the same?