Well I got my new 4.10 gears in the rear end. From a 72 3/4 chev. I got the info I needed here on stovebolt. Thanks for the help. The truck crusies at 60 mph now . Took 2 1/2 hrs for the complete job. First one I ever did. The Chev service manual helped to. Now I can cruise and not feel like I need to shift gears