Slant 6 power issues

No I don’t have power brakes. I probably have plenty of vacuum ports to plug on the carb tho. It’s a 74 but I’ve disconnected all the EGR stuff. It happened after I replaced the oil pump gasket. Had to pull the distributor to get to it without pulling the motor out. I’ve got it back in time though. If I adjust timing either direction it runs worse

Unlikely you have the timing correct. Do you have a timing light? Doesn't sound like it. I'd highly recommend getting one.