Firing order 91 F150?

A

Aarongriffey

Well-known member
So I’ve just done a major rebuild on a 302 out of an F 150 that’s going into a ‘65 Mustang.
I know number one is right front but I also know there was a firing order change sometime around there. I used a new 91 Mustang cam.
Can someone clue me in?
 
Unless its listed as an HO, its I 5 4 2 6 3 7 8, it should have told with the cam which order to use, if you still have your old cam, you can compare lobes.
 
The cam is the key to the different firing orders. If it has a 351 or HO type cam then it will have that firing order. A person can check it by getting #1 on compression then rotate till the next cylinder (either #3 or #5) comes up on compression. That will tell you what the firing order is for that cam.
 
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