The DOHC 4x4 gearbox is identical to the Cosworth box in every way - Bearings, shaft sizes, bellhousing, inputshaft etc etc.

The only difference between it and the Cosworth 4x4 box is the Cosworth box has an oil flicker on the 5th gear layshaft - Not a problem, I used a DOHC box in my 350bhp Cossie after popping 3rd gear of the Cosworth box

The V6 box wonh't fit as the bell housing is different and the input shaft is longer.