The gap on the 351 Cleveland changes timing. Adjust the point gap until it is at 28-32 and begin timing then.
If the 360 is in a F100 the point gap is .021. If the 360 is in a F250 or bigger the point gap is .017.
( .044 inch ) for the 5.8 L / 351 cubic inch V8 engine in a 1997 Ford F-250 , according to motorcraft.com
( .044 inch ) according to motorcraft.com
( .044 inch ) 351 Windsor and 351 Modified for 1978 Ford truck
I BELIEVE the point gap is ( .017 ) and point dwell is ( 26 - 31 )
On your 1997 Ford F-250 Heavy Duty , 351 cubic inch V8 engine ( 5.8 liter ) Check the Vehicle Emissions Control Information ( VECI ) decal located in the front of your engine compartment ( it will show the type of spark plugs to use and the spark plug gap )
The spark plug gap for the 1979 Ford F250 is 0.044. This gap remains the same for the 1978 and the 1980 Ford as well.
The point dwell is 26 - 30 The point gap is .017 According to motorcraft.com ( one of Fords websites )
.044 inch
0.044
.044 inch for 351 M and 351 W