This seems as good a way as any to say Hi! I am the keeper of a '71 K5, which curiously enough has a number of '70 features, including the original rear axle, which was coded as a '70 truck axle, as is the one I just put in. For those old enough to remember, GM had a strike in '70, and some strange things resulted. Cars and trucks they started building as '70s that didn't get finished before the strike ended up being marketed as '71s. Anyway, '69 to '72--they're all wonderful, but a trifle demanding at times.