Delco 10-SI, 55 to 65 amp unless you plan on powering a bunch of high current draw accessories. Anything over 75 amps is probably just for bragging rights - - - -"Mine's bigger than yours!" Most of us got over that attitude in the Jr. High school gym locker room! The ones who didn't became politicians or adult film stars, depending on whether or not they were telling the truth!
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!