[Clarke]

Quote: might have to change the 4:11's to 3:54 or something to try and help gas economy....anyone thing that would make any serious difference?

Thanks for sharing the pictures... F.Y.I. I had 4.56 rear end in my '62 3/4 ton and last year I changed to 3.54, mainly to reduce the R's on the highway. Barry (on this forum) was a great help with providing a Power-Lok since I had to change the carrier and an adapter for correcting my speedo after the gear swap.

For several years I was averaging around 9 miles/gal. After the gear swap, I'm consistently getting 11.3 miles/gal. I didn't make any other changes, and driving conditions/speed the same.