My new 71 GMC 4x4

[Erl]

Custom 68,
That is a beautiful truck (looks like mine). CPNE is correct as usual. That engine, 305 V6, was only offered 67-69. The larger 351V6 was not offered in the 4x4. The engine number is located right in front of the passenger side head on the top of the block. 305E should appear in the number. My guess is that it is a 69 model because of the power steering. In 68 GM was in the process of changing from the ram type to the power gear box most people have. The air cleaner looks like it is off of a Ford. This truck may have been ordered with the oil bath type filter and changed out. The radiator hose is not correct either, there should be a metal section between the two rubber hoses (not being critical). I will be happy to help you if I can. I have an extra 67-69 GMC master parts book you can have for $25 delivered if you want. Keep us posted. By the way, that truck will fit on a long U-haul car carrier. Brought mine in from Amarillo.