Flathead firing order...are all the same

A friend just bought a rat rod from a builder in Colorado; it ran one day. He replaced the plugs now it does not run well. I suggest the plug wires might be swapped but I, never owning a flathead, have no idea what the firing order is. Any help please??

 

The firing order on all flatheads is 1-5-4-8-6-3-7-2.

Check this site for detailed info http://www.vanpeltsales.com/FH_web/flathead_tuneup49-53_239-255.htm

 

And remember, Fords do the 1234 5678 on either side of the block, not like Chevy with 1357 2468

 

Thanks Gary! Funny that I figured it out right before you had researched for me. When the spark plugs were changed that must have been when #5 & #6 plug wires got swapped. She runs great now. Let me know if you ever need help on the car. At the very least I could come and take nice photos or some video for you.

Rat Rod........why I oughta hahaha