Update. I found a guy who specializes in drive shafts. He replaced both u-joints for $66.00 in about 20 minutes. It would have taken me days to do what he did. What a difference! The car feels great. I do not know if it solved my original problem of the clunck when cold, that will have to be checked when cold. But what a deal. Best money I have spent today. The only thing unusual was the tail shaft coming out of the tranny had a lot of play. But with the yoke attached no play at all. Anyone care to comment on the movement of the tailshaft with no yoke attached? Is that normal? To nice to stay in..... So out in the bird..Thanks for all your great advise!