[martindc1]

Originally Posted by 72GMCK-2500

Yeah i know some of the 90's gm 3/4 tons had 6 lug axles but i doubt they'd have a light duty 3/4 in back then. I'm thinkin its a factory screw up or i have a rare piece . It would be nice if it had the 16.5 inch 6 lug wheels, they are rare and were for heavy duty 1/2 tons and blazers!

My guess is that your truck got an axle swap early on to give better gear ratios for the road. Otherwise it would either have 4.11 or 4.57. I've never heard of a 67-72 3/4 ton to have anything but 8 lug axles. Maybe it was a type of thing where the dealer drove it around some before the original owner bought it and the dealer thought it would do better for highway driving with 1/2 ton axles. Its hard to say what the original story was, but it is a rare piece indeed.

To the original poster:

Awesome truck. Do you know what gear ratio the axles are?