I've got a '72 C10 with a stock 12-bolt GM corporate open rear. Gonna be rebuilding the rearend anyway and would like to upgrade to a posi as long as I've got it apart. Are 12-bolt truck rears pretty much all the same? That is, if I found a posi out of an '80 Blazer (for example) with a GM 12-bolt, should it work in my '72?
Thanks,
Brent