Puma final drive is 3.82
ZS is 4.25
1.25 / 1.4 is 4.05

All boxes have the same 1st and 2nd gear ratios.
Zetec-s and 1.25/1.4 boxes have the same ratios.

Puma gearbox has a less steep 3rd 4th and 5th.

closest ratio box will be a puma gearset with zs final drive... similar to the FRP.

FRP box is meant to have shot peened first and second, thats the only difference