The older Mr. Gasket and Moroso battery cutoff switches weren't rated very high on much current they can safely handle, I wore one out and learned that they are rated less than 100 amps There are better ones available, I bought one rated at 250 Amps and it worked great so can you find one to buy when you do a search Sorry for no links or company names: blush:
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)