Power Ram appears to be a 4 wheel drive version of the D-50. I didn't know, either, until the brochure arrived yesterday.
Last night I managed to get the short block assembled. These VW diesels are pretty particular about head gaskets. The bottom end needs to be built, and the piston protrusion measured before the head gasket can be selected. If the head gasket is too thin, the pistons hit the head. If the head gasket is too thick, the C.R. will be off. For a stock 1.5L non-turbo diesel, the stock C.R. is right at 25:1. For this turbo application, and with a non-stock cylinder head, my C.R. will be somewhat lower.
In this case, the piston protrusion is in the range of 0.037" - 0.040". Now, I have to consult the official VW head gasket decoder chart so that I can order the correct gasket set.
Steve