It is pretty easy to stick a flat screwdriver into the chrome knob and give it a slight pry to the side. The knob will pop off allowing you to remove it. Re-install using a vice and a socket to press it on. Done this many times with success.

70 Road Runner 383-4 4 speed FJ5 & black guts
70 Charger R/T 440-4 4 speed FJ5 & white guts