Hi Greg,
Why not go ahead and sell the engine/transmission as a unit?
I would not use two stroke mixture in the FD personally. If it were mine and I refused to sell it, I would drain the fuel from the fuel distributor (lines, plugs, regulator) and wrap it tightly with saran-wrap (wrapping the fuel distributor especially) and make sure you wrap it enough that little bugs won't be able to crawl into the engine.
When I bought a used fuel distributor, it was dry for over a year, sitting on the air-flow meter and not wrapped up with anything, and it is still performing very well for me after a year of operation (thank God!

)....I had been running a holly 2 barrel carb. off a 360 Dodge truck mounted to a hand made intake adapter (that I made) since I could not locate a used fuel dist. but I had to drive my 300E!
The valve-train should be fine with dry storage and especially wrapped up with saran wrap, but you could make sure to close off the exhaust manifold holes as well. A bit of oil down the spark plug holes and rotating the crank will be peace of mind more than anything in my opinion. I wish you well, good luck.
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'87 300E | 2.6 engine
Artic White - Navy blue interior, chrome rims, very clean and sharp!
91 300E
89 300E
The rest of my collection are just cars and trucks...no more "automobiles"...