Stop in for a cup of coffee

Yes 37-41 round back spindles. Akerman is way out from where it should, but again, 1000's of miles, and now suddenly issues. Not sure KPI, abut king pins are set. Only toe is adjustable
I’m more wondering if the hubs or maybe just the spindles are now worn out of from the KPI being off and that’s what’s thrashing the bearings? I just know when I was looking at build a T bucket using that same year axle, there were loads of reports of both KPI and Ackerman causing hubs to fail with certain kits. I’m a little curious too if the 37 spindles aren’t up to the task of the speeds and heat of modern traveling speeds.

you might go over to the H.A.M.B and post this there. Those guys are a HUGE source of knowledge similar to here but mostly focused on beam front axle cars