if one were to re-number a ford firing order by re-naming the drivers side cylinders 1-3-5-7, and the passenger side cylinders 2-4-6-8, the firing order would then become 1-8-4-3-6-5-7-2.
this only works on certain ford engines, so be careful.
i think i did this on my one buddy's 390 that's in his 64 galaxy.
was kind of funny at the time.