[snelson903]

ford seemed to have made a different ing. system every year in the 70's but even back to the middle 60's they tryed to have the points as a trigger for a transister based system instead of directly firing the coil. gm did the similar in the 1966 olds 98 used the the points to trigger a transister you could only get it as a special order idem , you could tell the cars that had it they used a oil filled coil painted red only ,and the resister was made inside the coil they had twice the fire power as the black coils . back in the 70's you could tell what ford ing module you had by how many wires they had ,they always had a grounding problem being bolted to the fender skirt ,if a car would burn out modules alot everyone would run a wire to eng to module and check all other grounds. cry was hole other animal esp with leanburn intangled with dist advance ,they had more than one type of resister single /double, everyone just kept a spare in the glovebox .it all came down to points really sucked and thats why in 73 gm made there h.e.i. dist. ford put there module on the side of the dist. and two choices 7 pin 9pin and it was in use until d.i.s. in the 90's. oh yah i keep forgetting to mention if you are old enough when you to parts store and ask fore a coil remember they always ask if you internal or external resister type coil thats were some was hiden. and how the car's would run if the owner put a coil with a resister in it and the car had one too.