1966 GMC K25 Disk Brakes

[1971 GMC SHORTY]

Originally Posted by jeffahart

Your call sign threw me, 1971 shorty, but your working on a 66... Cool! Should bolt right in. What's in it now? Standard 44? I just did my 1970, which is first year open knuckle and last year drum. An Aardvark axle, I tried to sell it and ended up scraping it. Only thing I had to change on swap was: brake lines, U-bolts, Steering damper, took check valve out of front reservoir. You should be able to bolt right on to your springs. Just note your angles and check again after bolt in. Just so you can make sure pinion angle is good to go after bolt in.

Gear! With those tires and engine(can't see post now that I'm typing this and thought I saw 35,) I would stick with 4.10s

Not overkill. In fact, unless you are trying to keep the truck original go with the Dana 60. Only trouble is locating one that's not UGLY <= capital UGLY. I had trouble locating a decent axle and did not want to pay to much for overpriced junk. So I gave up the hunt and bought a CUCV take out dana60 corp14 combo from Boyce.

I'm very happy, glad I did it!

I use To Have 71 GMC Short Bed
The 66 is a Utility Bed Truch So I think The weight Bight need A Dana 60