A lot. Even more if it has a cab... unless you find someone to bid the job without ever having changed one of those before...
Bank on a day's labor plus whatever incidentals you run into. More often than not the PTO drive spline on the pressure plate are bad along with the PTO input shaft on the transmission. Normally you also change the engine rear seal and seal carrier gasket along with the core plugs in the rear of the engine while you're in there.
Ford 30 series tractors are just a bugger to split. The fuel tank and steering pedestal need to come out for best access to the housing top bolts... and that can take a bit of time, plus working around the loader frame.