Remove the engine bay radiator cowl, and the viscous fan. Probably have to remove the radiator top hose too.
Not sure how on the C30SE (only done the LC C36GET/S6-40) , but you'll have to either disconnect the gear lever from the gearbox, or the gear lever from the transmission tunnel somehow.
Exhaust off, undo prop-shaft to gearbox coupling (4/6 allen headed bolts?). Then support the rear of the gearbox on a trolley jack and unbolt the gearbox rear support (4 bolts IIRC). Once the rear support is off, slowly lower the rear of the gearbox. The engine will pivot on the engine mounts as the gearbox drops. Watch out for the wiring - speedo drive and reversing lights. Unplug them as they become accessible. You'll also have to remove the clutch slave. I'd assume two bolts same as the LC, but as I say never done a C30SE.
The reason for undoing the viscous fan and removing the fan cowl will become obvious - as the engine pivots you don't want the cowl to break or the fan to impact the radiator.
Once the rear of the gearbox is as low as it'll go, jam a piece of wood between the bottom of the oil pump cover and the antiroll bar to 'lock' the engine in place.
Then finally as others have said using a selection of extensions and wobble joints undo the bell housing from the back of the block. Easier on the LC because the gearbox comes off the bell housing first, but not on the AR25/35/MT28. You'll just have to work out what works.