Okay I am building a 98 Cobra that is a track only car, I am running a 1993 302 based motor, with a painless wiring harness, this was the quickest and best way to get the wiring thing done, anyway I need to find a one wire alt, I am looking at a powermaster unit, about 140 amps, but they also sell a 100 amp unit, which should I go with, again this as a track only car.
