Use a fusible link where the ammeter wire connects to the starter cable. It will handle current surges better than a fuse. I'd choose a piece of fuse link of about 12 gauge- - - -which should have a burn-out point of around 60 amps or so. Be VERY sure you get a good electrical connection. I use a Western Union splice for fuse links.
Jerry


"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!