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7.5, 12 or 28 spline (I'm looking for both), 3.42 ratio on the 28 spline and 3.73 ratio on the 12 spline. For a '89 S10 p/u and a '86 S10 Blazer. Just the diff, no R&P.
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'86 S10 Blazer 4WD, '87 2.8 with 3.1 crank and pistons, A.R.I. "Stage 2 Cam", Iron Heads with stiffer springs, Holley TBI, Manifold bored to fit the TBI Base(4.3 size), Fiero Covers, MSD Coil, DynoMax Muffler and 2.5 Tailpipe, no cat, Auburn Limited Slip, 3.73 final Drive. 700R. '85 Fiero GT 3.4 Hybrid, relieved top intake and exhaust, 57mm TB, Auto. 3.06 final drive.