I used a 90 amp marine breaker made by BUSS and a #6 wire to the starter relay. And a 300 amp car audio breaker(made by stinger) to the starter on a 1/0 or 2/0 wire. It also double as a theft deturant. I shut the car off "at the main" if I'm gonna be away from it for a while. Both were eBay...
My dad had a 499 Chrysler with some high dome ross pistons. He ran like a .100 copper spacer and indexed them, otherwise the pistons would tag them just enough to close them (at idle). Piston to valve clearance was never an issue.
Kids huh? LOL!!! If my poor kids only knew how many of my F-ups they've gotten blamed for, ( wrong clothes in the dryer, broken plants, toilet seat up, etc etc etc!) Its your story pal!