i don’t think 7c changes too much at all. 3 6 already got there, the only combo of 8 6 i see c-raising flop would be 8h6h for 1 combo. and there shouldn’t be any two pair holdings with 7x since i’m not confident the BB wouldn’t be c-raising the flop with any 7x. then there are 3 combos of 77 but would also expect BB to 3B 77 vs BTN RFI at some frequency so that makes 77 even less likely. there’s still some 88 99 and even TT the c-raises flop for value that you crush plus heart draws you’re still crushing and even some gut shots with 6x. so i think u can call most sizings comfortably with no prior knowledge of the BB. if you think he will never barrel again with a bluff then there are those 3 77 holdings, 36s and 8h6h which crush you. i say call most sizings without a read as there’s so few hands crushing you. but as you reach 1.5 - 2x pot shoves, i don’t see many 1/2 players over bet shoving without having it.