318 piston's and quench

I remember quench type 318 pistons were hard to find when I was planning a small block. I went with a 360 with a step-dish quench piston @ 9.5 c/r, and magnum heads and a little bigger cam. My piston to head clearance is .050 Engine runs very powerful on pump gas. I would recommend ditching the 302 heads and going with a replacement magnum head and headers. Do you have a roller cam block?? Then find a zero deck flat top with valve reliefs or a step dish piston. No dome quench pistons. Adjust quench with head gasket. To take full advantage , have a timing chain tensioner and blue print the whole engine and degree your cam. 318s are great engines being they're internally balanced and have a smaller main journal. Don't overspeed those stock parts! Measure piston to valve clearance and account for part expansion and it may be wise to set quench to .045 max without better rods and pistons.