Quote:
Originally Posted by Captainfab
The 1970 12 bolt coule be either 62" wide or 63.5" wide, depending on whether it is a early model or later model '70. Either way it will have 6 lug axles unless someone has changed them. The good news is that it will bolt right in under your '65.
The '71 and up C10 truck 12 and 10 bolts were all 5x5 wheel bolt pattern and are 1.5" wider than the earlier differentials. Most of the '72 and earlier under Chevy's were for trailing arms, but most all '63-'72 GMC's had leaf springs.
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SORRY 2 JUMP IN ON THIS ONE I HAVE 61 THE REAR END LOOKS LIKE 9IN STLYE BUT HAS STUDS HOLDING IN FRONT AND BACK OF THE PUMPKIN ANYONE HAVE ONE ? AND WHAT GEAR SET IS IN THEM RIGHT NOW WITH A 350/AND 700R4 I AM TURNING 2500 RPM'S AT 70MPH ,,FEELS LIKE 4,11 OR 3,90 THX GUYS WOULD LIKE TO GET A POSI IN THERE ANYONE GOT ONE ? MAHALO HOP
