my 67 mustang is equipped with the tilt-a-away column. it does not currently work but i guess the tilt away motion is activated by a vacum canister as the door is opened. somone was telling me that this was a rare option on the mustang and it was only on the 67 - 69? was this column system that rare of an option? how difficult is it to get this system to work? it looks like all the parts (canister, wiring etc.) are in place but not sure how to diagnos why it doesnt work?