Clank noise when put into reverse or when releasing throtel at high rpms in any gear

Thanks for the info AJ/FormS , iv been peg legging it for a while... :banghead: haha even though it's my daily I only put about 21 miles a week on it. when I get home I'm going to check the play on the gears and then the crosspin to see if it's already shot. But if worst case scenario is putting a posi in a plymouth that's fine with me!