I had my cab corners sand blasted. My cowl, roof top, back panels and doors dipped as I didn't want them stretched and there are so many hidden areas. The place I have them done at also with elpro prime them (electrostatic primer applied in a dip tank just as the new production cars are done. If you are careful the cab corners being such high crowned panels can be sand blasted. King pins 1931 thru 1940 1.5 tons are all the same; cars and 1/2 tons are different. Try ChevyB for parts.