Carter BBD vs Holley 2280

I ended up ordering the Holly r8691 from the same listing on E bay last year. The motor has been rebuilt (1971 Scamp w/stock cam) The carb is popping ( seems like it is running lean) a bit. I have checked for vacuum leaks already and am wondering if I need to re jet drill out the jets to make it run richer. Do you think this would help? Can you recommend a jet size? Thanks!