What is the plug wire diagram for a 1977 Ford F150 351 modified engine?
The firing order on this engine is 1-3-7-2-6-5-4-8. Look at the distributor cap. There should be a number 1 in about the 1 o’clock position. The first plug wire goes there. On the other end, place the wire on the number 1 plug, (the plug on the passenger side closest to the grill). Next, going counter clockwise on the distributor, follow the firing order. So the next wire would be number three, then number seven, and so on.