Guest Posted April 6, 2003 Share Posted April 6, 2003 i recently bought a 66 442. It has a 10 bolt rear, and i want to put in a 390 posi unit, and I'd like to know if the axles are 26 spline, 28, 30, or whatever. it would be a much easier project if i didnt have to pull and replace the whole rear axle assembly to make the switch. Thanks for any help.Eric Link to comment Share on other sites More sharing options...
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