Not to be a jerk, But Captkaos is wrong . 3/4 ton 4x4 's do exist . you cant get more proof then the VIN and RPO code sticker
Capt. only said in all his research that he never found 3/4 4x4 crew cabs, I am sure he was only stating what information he had. After this started, I found a 75 crew 4x4 single axle on CL, had to check it out. The vin# said it was a 75, yellow k20 showed pics of his vin# and it confirms.
No one is perfect or all knowing, I am sure Capt. is trying to find more info, but to his defense, he said he did look throughly and never found evidence of any except 2wd.
So lesson learned,
no one is perfect, but pholliday1 you are right, this site is excellent for correct information and I think most people have come to expect correctness here.