1-3-7-2-6-5-4-8 for a 351 Windsor
ford 351 windsor
( .044 inch ) 351 Windsor and 351 Modified for 1978 Ford truck
( .044 inch ) according to motorcraft.com
www.motorcraft.com shows the spark plug gap for a 351 ( 5.8 L ) in a 1993 F-150 as .044 inch
.044 inch
i have read at another site that it is around .044
Ford truck 351 windsor fuel injected
.044 inch
There is no such thing as a 2001 f250 351 Windsor. I believe the last year of the 351 overhead valve motor was 1996.
The 1976 351 Ford engine spark plug gap is .034. Most spark plugs will come pre-gapped from the spark plug manufacturer.
Start with telling us what year it is.