Anyone have a C/K 10/20/30 fuel tank laying around? I'd like to know the depth of the tank. Either the "normal" tank, or the optional dual tank. I *think* they are the same size, or at least appear to be the same depth, but I haven't been able to look real closely. Kinda thinking all sending units are the same depth, but need to know the depth of the truck tanks to compare to the K5 tank. The part number differences for like year sending units perhaps being based solely on the sending unit fitting orientation, at least among the same GVW/engine combination. If the sending unit fitting orientation is the only difference, and not depth, a 1987 TBI passenger side tank sending unit would make a TPI conversion easier. Having the sending unit fittings on the drivers side, which is where the fuel lines need to be on that swap, would save a 90* bend, as well as having to route it over the rear crossmember.