The rear i am building is SBP and the car had originaly BBP so the front wheels will need to be BBP and back are SBP ... i thought may changing rotors to SBP on the front would work but i guess not...getting BBP rims is easier
For the ease of getting parts in the future you would be smarter to set up your 8.75 for big bolt now. The sbp 10" rear brake drums are obsolete, nearly impossible to find new now and it is just going to get worse as the supply of good used ones dwindle.