BB PC heads

I have Indy SRs, but they are 75 cc stock, but are polished so maybe 77 cc. Are stage 6s 80 plus cc? I do have a set of stage 6s with about 200 runs on them. They are on my 470 stroker. A guy wants to buy the short block. Kim
The stage vi are 88cc. I don’t want to go below 80cc to keep my ratio around 11-1. I don't really need another set unless they are cnc ported.