Just some thoughts on your original post..
A leaky rear main seal isn't likely to cause a clutch failure,, so treat these as seperate issues..
If the engine is really wet with oil,, it would be wise to find the sources of the leak before pulling the engine,, it may be something as simple as the valve cover, oil pressure sender, fuel pump gasket,, etc.. The fan and gravity send all oil to the back, and lowest point of the engine, and a lotta rear mmain seals get changed ,, only to have the leak continue.. So clean the begeebees outta the engine with "brakeclean",, to track down what's leaking..
I realize you WANT to take the engine out,, but your timing may change when you realize you can change the clutch now,, and address the oil leak at a later date, and it may not require engine removal..
Hope it helps....