If it was in a H.D. truck (above 2.5 ton) it should have had a industrial 354 C.I. Chrysler Hemi type motor with 1/2 inch diameter valve stems, low compression, solid lifter with adjustable rocker arms and rocker cover to clear the rocker arms and a carb. with a governor on it stock scope IHTHs up

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