67/68 GM A-body tilt steering columns are not common. I have been looking for one for my 68 Skylark project for some time. Most of the after market suppliers make them but they are expensive and I am cheap. As I understand it, tilt was a luxury option and most folks who bought A-bodies weren't into luxury. A guy in Cleveland advertized a pile of 68 Riviera and Skyark parts on Craigslist so I took a look. He had a 68 Riviara tilt column which might have been standard on a luxury car. My point is they are more common. Anyway, it is the same length as the A-body column and bolts right up to the A-body adapter plate between the column and the brake bracket. The only significant difference is the arm on the shift tube that connects to the transmission linkage. The a-body arm comes straight out more or less but the Riviera has a bend in it that extends the linkage attach point about 5 inches farther down the column. I disassembled the column, cut the old shift arm off the shift tube, made a new one to match the one on my non-tilt column, brazed it to the shift tube and reassembled the tilt column. I've got $30 in the whole thing. I'm not sure if the Riviera pin-out on the electrical connector is the same as the A-body, but mine was junk so I used the turn signal switch/harness from the non-tilt Skylark column but had to drill a hole in the cover sleeve for the hazard flasher switch.