Yeah, I was figuring on changing the springs after I map out the stock advance curve and did some driving to figure the stock mpg. Then start experimenting with initial and mechanical advance to find the best combo. Keeping initial and vacuum advance at a total of 30 degrees. I still need to finish my exhaust, and replace the cap, rotor, plug wires and add a supercoil.
55mph was the national speed limit in '78, so i figure the gearing was set up to get best mileage at that speed or under:
(55mp x 2.73 ratio x 336) / 26" stock tire diameter = 1,940 rpm
