Will my 360 cast crank, cast piston……

What fuel? Pump 91? You’re in California so you have the worst pump gas in the country. It will detonate easy and shatter those cast pistons very quick. If you’re going through all the trouble of having the motor rebuilt a set of forged pistons would be an extremely wise decision/investment.
If you can get e85 that’s better, but you should still go forged.