Shift lever still will not Move !

It sounds like the column is not letting the shift fork move lets try disconnecting the cable/linkage and then move the shifter with the ket on. Here is a diagrams to help us see what's going on. Let me know

OK, if you have a rod linkage, it should be under the hood attached to a lever on the steering column next to the firewall. Does this lever/rod move when you move the shifter?

OK, I'm trying to picture this. You say the rod attached to the shift arm under the hood is connected and moving up and down. Correct?
Is the rod under the hood, attached to the steering column, going back to the trans selector arm move back and forth?

OK, now we're getting somewhere. Apparently, the socket that your shift lever fits into, inside the column is broken. This is more common on manual shifts than automatics, but it does happen. You can buy replacement parts, pull the steering wheel, signal switch and key assembly to repair it, but it's a miserable job. I would highly recomend buying a used column and replacing the entire unit. Being an '87 truck, you should have no problem finding a used on at a reasonable price and probably even match the color. Let me know'

If you have all that apart already, your 1/2 way there. What you need to do is determine what's broke and what you need to replace. If it's the shift collar, they are readily available, but come unpainted. If it's the shaft going through the column, you have to pull the column out and trar the whole thing apart. A big job. Good luck. Personally, I'd change out the whole column.

Hey, don't appoligize for not knowing somethihg, none of us know it all. We weren't born with knowledge, we all started out asking questions just like you have. Best to ya', anything else, you know where to find us.