I once made a 48/54 Chev truck..had a 48 cab on a 54 frame..had a 54 box on it,,but i put the 48 cab on the 54 frame..Funny thing was,,the 48 cab had No "Gas-hole" ,,like the 49's on up did..i thought of that when i sold it..I said.."They're going to have fun with that truck,,getting gas into the cab"...lol.. ohwell