I've had some experience with a 360 industrial / truck engine once that had an oddball casting number of 857. They where like 234 industrial heads except they had exhaust instead of water going through the manifold crossover. They where small port like 234 industrial, so I imagine they had small valves and closed chambers. It was done at 4000 rpm, but it would blow the tires off at will up anything before then in a W150. I would stick with some bowl work and a good valve job on the stock heads and would give this camshaft a whirl.
Howards Cams, Hydraulic Flat Tappet Camshaft, Chrysler SB 273-360/318, 208/214 @ .050, .479/.494, 110 LS - Competition Products
