I think what you want is Best Gasket # 7023. Says it's for Chevrolet Truck 1931-47 except LS, LT (30 and 31 1-1/2 ton). Available
HERE.Gasket shellac is old school gasket sealer, just used to stick the gasket in place. But you don't want to use it on the part of the cork gasket that fits against the u-joint bell, because that has to move.
