Not to nit-pik, but the MSD 7 was available before 1977. I had one on my 65 Valiant Z/sa before 1977. I think it was 1975 or 1976. Had to special order for the 6 cyl, not a 8 cyl. and it did not have the Chrys connector. It had a terminal strip, and was wire with direct wiring.