What's the wheel base of the 6400. Normally a 6400 would be too long of a chassis for a shorter 460 service body. 460's were usually mounted on dual wheel 3800, 4100, & sometimes 6100 series chassis (my Holmes Wrecker Catalogs recommend mounting the 460's on 1 ton, or 1 1/2 ton chassis). You guys may be better suited to find a 515, or 525 Holmes unit, which will have the longer service body for the 6400 chassis. Holmes recommends mounting these two Wrecker units on a 2 ton chassis, which your 6400 is. Mike B on this site, knows of a 525 unit with original service body (just like the one on his '56 Chevy ) For Sale.
