What need to be done to make the rb26dett rwd in a r33 skyline rb25de?

k i have a 1994 nissan skyline r33 body im wanting to put the rb26dett engine into it, my question is does the rb25det gearbox straight bolt onto the rb26dett engine if not what do i need to do and buy to make it fit i heard that the sump needs to ne changed i found one of them but will it need anything else thanks