4/7 swap in firing order..

Guitar Jones said
I find it hard to believe that Ford engineered anything for a good reason. Just happenstance or luck though I can believe. lol

Fords need oiling work, rod journals are narrow, need head work[new heads for that matter] the intakes short sides are cliff's and the exhausts are curvy pos's.
CJ heads r decent but then what's the port volume???