T18/np435/toploader spline and bellhousing pattern

Hi everyone, I'm from aus with a 77 f100, Cleveland and 4 speed manual. Does the toploader share the same input shaft OD and splines as the t18 and np435 gearboxes? Is the bellhousing to gearbox bolt pattern also common between the toploader and t18/np435? I wish to add a ranger overdrive between 4spd and bellhousing, made by advance adapter. It is advertised to suit toploader pattern. Cheers