Looking into Langdon's HEI distributor for the truck. It says that pre 54 needs hardened distributor drive gear. That part is clear cut. The big question is that it currently has an Isky cam that I bought new in the 70s. I am not sure, but seem to recall that tey advertised their cams as hardened. What advice can anyone give on which distributor drive gear to use? Thanks, G.H.
