Originally Posted by Suburban Lou
Just horsen around I heard everyone was running a 7lb? It's a stock 6
In 1949 and in 1951, a 0 psi radiator cap was standard on all but 5000 series trucks (4 psi on them - low-speed, many stops, delivery van type bodies/trucks).

The 4 psi radiator cap became standard in 1954 trucks.

Would a 7 psi cap cause problems with the radiator and heater?