I know for sure you can find a 71-72 4x4 doner and get the front diff. from it. My 70 actually had discs, don't know if it was stock or not. Try www.coloradok5.com . Those guys would know.
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"KEEP IT DOWN!"
70 Jimmy 454 2wd
56 GMC Big Window
"It's funny till someone gets hurt, then it's freakin' hilarious"
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