Need advice with new heads

So I plan on some RHS heads for my 360 but am wondering what compression ratio to run. With a tight .040 quench and shave .025 off the heads I could get 9.7:1 with my step dish pistons. If I leave the heads alone and run a safe .054 quench my ratio is 9:1. I could also mix it up and run anything in between or more if I shave the heads extra. Motor is in a heavy truck and runs above 5000 feet and has a Comp XE274 cam.