Engine help please....

You know some fords require the firing order to change with cam swaps. Also, what octane are you use? But definitly check the valve to piston clearance.

 

289 1-5-4-2-6-3-7-8
302 (Pre-82) 1-5-4-2-6-3-7-8
5.0 1-5-4-2-6-3-7-8
5.0 HO 1-3-7-2-6-5-4-8
5.0 Truck 1-5-4-2-6-3-7-8
351 1-3-7-2-6-5-4-8

 

Why not all the valves then? he has a problem with only one.

 

Only a few of my valves were barely touching. Don't know why..but thats what i saw when I pulled the heads.

 

I will do the straight edge, and examine the valve length, and pushrod length saturday. New rocker and nut will be in hand tomorrow. Still running ok, nut hasn't moved.