the oil for the box is specific to the MT75 box and even ford now state they use a different one, but it's easily noticable when the gears start to crunch

but you ned to remove the gear stick first
then the exhaust and props and starter and arb before you can remove the mount but remember to undo the bellhousing bolts before removing the mount so that everything comes off nice and easy

and if you replace the bolts tht hold the engine crossmember in place with long bits of threaded rod you can move the engine up and down a bit more to give you more clearance, just remembr to undo the steering intermidiate shaft first