So I just acquired three IH trucks; a 56 A100, 59 100, and a 75 IH P/U. After looking at the three it seemed that the 75 has the potential for becoming a sweet looking rock crawler. It is a long bed 2wd with a propane injected L6. Initial plans are too bob the bed, dove tail the front and rear. Was thinking of keeping the L6 engine but I don’t know anything about them or IH for that matter. Is the L6 worth running on a light weight, low geared rock truck? I know I could drop a SBC in it but thought keeping the L6 would retain some of the nostalgia of the original truck.