My bet is you broke the joint and that broke the yoke? and then the tail shaft. Been down that trail myself. Worse case scenario. New tail shaft housing and possibly a tail shaft. I have a shaft here from a buddy's 66 Coronet. Broke the joint driving down the freeway. The shaft is bent at a 30 degree angle. Replaced the shaft and tail housing (along with welding up the floor pan and gluing the console back together). No other trans parts were replaced. been probably 10 years since, still fine.
Doug