The ZF has the bell housing integrated with transmission and a hydraulic clutch. Broncitis on here, is running a four speed toploader. There is a RUG 3speed and overdrive I have thought about, but it will take some deep gears(4:88 or above) to be effective. Any oversize tires will compound the matter. And of course using any V8 tranny brings up the issue of length after adding the transfer case, making drive angle steep. I have 30" tires and plenty of power, but any OD would be useless for me, unless I redid the gears.