I have a Holmes Manual on how to install a Holmes model W35, but not a 460. Probably not much difference. My experience removing several 515, 525, W35, & W45 units from trucks, they most always had a wooden runner, or blocks between the top of the frame rail, & bottom of the service body. The thickness of the wood will be determined by a test fitting to line up the running boards of the wrecker service body, with the running boards of the truck cab.
