Or the tank that catches on the shift plate broke off.
Now that we are guessing, there is a way to actually know what is wrong. Take the steering wheel off and look around. You will need a steering wheel puller, just go to the local import tool dealer and get a universal puller. It has a yoke that looks like the center of a piece sign and a bunch of bolts to attach it to what you are trying to pull off. You don't want the one with jaws/hooks for this. Take the steering wheel off, look around, might have to reference some parts catalogs if it is really bad.
One more thought, do you have a shift indicator on the column? No? You may not have an automatic column. More than one automatic conversion has been done using the old 3-speed manual column and just hooking a shift rod to the transmission. Count the clicks shifter. You will need another column if you want to stay column shift.