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390 plug gap & firing order

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Old 08-14-2003, 10:33 PM
roanie roanie is offline
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390 plug gap & firing order

(I did a few searches and couldn't find the info although I am sure it is in here somewhere.)

Can someone please tell me the spark plug gap and firing order for a 1975 390?

Just bought a 1975 F-250 4X4 390

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roanie

Now there are 4 Ford trucks in our family
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Old 08-14-2003, 11:30 PM
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460 Crew 460 Crew is offline
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390 plug gap & firing order

.044 and counterclockwise at 15426378
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Old 08-15-2003, 12:44 AM
mypa'struck mypa'struck is offline
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390 plug gap & firing order

I am curious, would a smaller gap produce a colder spark? Mine are gapped at .035. Old chevy habits die hard I guess.
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Old 08-15-2003, 07:00 PM
roanie roanie is offline
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390 plug gap & firing order

Thank You!
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