That 63 hardtop is one of the Rettig Bros. cars I have not seen on that truck shock
Don Wann used that truck, he was sponsored by them for years and years, to haul his 1963 Savoy M.W. SS car and Dave Rettig 1965 original A990 Dodge and the 1964 Plymouth Hemi SS car they built later with the same paint scheme on all of those cars up

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)