[FORD80]

I currently run a 557 mild port cj heads 13:1 msd 6al ingnition,msd dist.1000 cfm 4150 prosystems carb. I am using autolite ar25 plugs. What gap should I be running to get the most performance? In A MUD TRUCK.

Thanks in advance

 

[bigblok86ranger]

I think .035" is a good starting point.

 

[crittersf1]

.044