Not sure how much a kill switch would save you. how mauch h/p does it take to turn the alt when it's charging? 2..3 maybe. Anybody have any real world times? On my old 67 coronet I tried a few things. I disco'd the PS belt..nadda zip, Tossed a Alt belt at the line and still ran dead on 12.90, replced my HEAVY 45lb 15" Cragars w/ 14x5's and bais plys up fron...nadda 12.90. Went w/ Man steering...nadda 12.90. Now then I added 6psi of boost and dropped almost a second off the et and picked up 10mph