I've got a 1980 blazer, It was an auto but somebody converted it to 4 speed. I replaced the clutch and everything about a year ago, and the throught bearing was in two peices. Now (a year later) my bearing is chattering and squilling, I asuming it's shot. What would cause this? I was wondering if whoever converted it to 4 speed didn't do it right or is it something else? I'm about to through an auto in it, don't want to. Also was wondering if anyone has pics of half doors?