Howdy Jim. 1968 534 info I have here shows firing order as 15486372 with the note cylinder numbering (front to rear) is RIGHT BANK 1-2-3-4 and LEFT BANK 5-6-7-8. Plug gap .030 Point gap .017 with 26-31 Dwell Timing 8 BTDC (Damper) Centrifugal advance 2@500 14@... Login to read more.