Very Very Very lucky! Turned out to be that locking sleave in the hub was backwards and wouldn't engage fully. Got into the sand and it just poped back like it was unlocked. So fixed that, putting my 4" lift on, new u-joints, repack all the bearing, etc. etc. The blazer should be running again by Sunday. I got really lucky! Displacement, cubes, and did you say you drive a riceburner???