Yep...and the calipers were dear too....should have gone into the Vin# with a bit more enthusiasm...the only tag on the diff indicated that it was a "non slip"...no ratios or other numbers. Didn't get the bad news until I popped the cover.....oh well.
I've heard that the S10 Blazers (4wd) have a 62" diff....hopefully, somebody that has spent time crawling around in the junkyard will pop in with some good suggestions. Till then, I guess I'll be driving it like a 4 speed and keeping my eyes open.
Thanks for your responses.