Yep 1200gxman is right. All you need to do is take the orginal mounts off which is a fun job, grind down the welds as much as possible then hammer and chisel them off. The box fits in fine. It is a little bit tight, getting oil in is abit of a pain but garden hose down the bay and squezzing the hose in works everytime. Also the reverse swtich i took off like on my old 60a box because it sticks out to far.

But other than those small things they go in no trouble.

If you want ideas on the gearbox xmemba and pic of it in have a look in my photo album, there is alot of pics of the install on there.