I have a full size 9” third member (31 spline) for sale. Less than one year old. Made by Reider Racing, with Precision Gears and Timken bearings. It has a Detroit locker (no-spin) and 4:56’s gears.
It uses the larger style u-joint, the 1330 (spicer #) Also selling off the axles with it. They just recently had new bearings and seals put on.
$850 for everything.
I live in Boston. Not paying for shipping.