bob

Double swap firing order is 1-8-7-2-6-5-4-3

ezstriper

the swaps are more for taking some of the load off the cranks, 632's are bad for breaking cranks, with the double swap seems to help that issue and pick up a few HP on the dyno, but I would not waste my $ just looking for more HP in a normal boat app. Rob

formula 382 sr-1

Yup ,We are running a RM builder cam with a 7-4, 3-2 swap
BAD AZZ !!!!!!!!

scarrab30

I run a 4-7 swap. I don't think its worth doing. I only picked up 5lbs torque and 4hp. I did it more for harmonics and crank life.

vette131

this firing order is the same as fords 13726548 due to fords numbering system start at 5 & follow the firing order through the cylinder layout & you get the same sequence.