I don't think the route trucks ever got a Hemi, most were delivery trucks with the flathead 6. Little room for much else. Also, by the early to mid 60s, the funky rear axle was gone. Had a guy come in my shop with a 63-65 (can't remember which) and it had a standard 8 3/4. There was also a route van running around here with a big truck (1 or 1 1/2 ton) frame under it. Gene