65 & 66 frames

are 65 and 66 chevelle frames the same dimentions or is the 65 frame narrower

64-67 should be the same A Body Frame, Only convertibles and El Caminos have boxed frames. The El Camino frame is about 2 inches longer (in the rear) than the convertibles (only difference).Sedan frames wont work on converts or elky's because they are weaker.