I have a 1968 power steering column that is A-body length but it has a B-body firewall cover plate on it. I suspect it was a B-body column that someone wanted to use on an A-body and slid the two-pieces of the shaft shaft together more to make it A-body length and then injected new plastic in the little holes. But then, I suspect they couldn't get the B-body firewall plate off because they couldn't pull the inner tube out to swap the firewall plates due to the reverse switch pin. My question is, was the same two piece steering shaft used on A & B-bodies with the length just adjusted accordingly before the plastic was injected into the little hole? I hope my description makes sense.