I just bought my first BBC. It’s a 289 block. Have no idea on the heads, cam, compression, etc... was pulled from a 1974 Pontiac Firebird & the guy wanted to put the correct motor back:3dSMILE: in. Was able to hear it run & set me back in the seat :D Only problem is he wanted the small carb ( Holly 650 ) & I need to get a new carb. Just don’t know what is the best one?? Thanks...