enough people have built 10bolts up and run in the 11's with them that it is perfectly worth whiel to spend less than half teh price of a 12bolt.
28 spline axles as used in the later cars offer more contact surface and are stronger.
the 2 big things to 10bolt life are welding teh axle tubes and getting a good cover. 90% of teh failures that people have in 10bolts have everything to do with case deflection, not the strength of the gears or carrier.
later
tim
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