Recently picked up a nice old 65 GMC 1-ton flatbed, 305-6/4-speed. As all of you know, it rides like a buckboard and maxes out around 55mph. I'm new to trucks bigger than 1/2-tons so I'm learning as I go - what is the rear end in this thing and ratio?

I'm going to find something to swap into the rear so I can go down the highway at mellower RPM's. Thanks!

Brewtus
1952 Chevy COE 5-Window, 1948 COE
In the Stovebolt Gallery
More pix in the 'Bucket

Use to have --'50 panel, '50, '49, '54, '51 1/2-tons.
'67 Corvette for those 'need for speed' times