If you are worried about enough vaccuum you can put a vaccuum canister in-line between the engine and the booster, that'll give you an extra reserve. Companies like Speedway Motors sell them for fairly cheap with the check valve.
Another thing you might want to add is a vacuum line filter to keep oil and fuel fumes out of the booster. those fumes will ruin the booster. The filters are pretty common. I got mine at NAPA.
'51 Chevy 1/2 ton w/'62 261, HEI, offy, fentons, dual carter/webbers, t-5 & 12 bolt posi
| 
