I've rebuilt a few of them. I actually had a few extra seals kits for it as that is really all that you need. I think there is only about 5 parts to it. I cannot see why a 67 is any different then the 68 or 69. I think I have one sitting on the shelf but it came from a 68 if I remember correctly.
68 Firebird 400 Convt 33 option car:tilt, cruise, AC, 281 trim code leather interior, PDB,PS,P top,headrest, rear antena, Ralley 2's, TH 400, Speedminder speedo buzzer, clock, tinted windows, floor mats, remote mirror, door edge guards, remot decklid release, trunk lamp, saftey track rear, am fm radio, visor vanity mirror, custom seatbelts, console,heavy duty air cleaner, exhaust extensions, tinted glass- all. All factory installed total price $5121.18 !!!