On the OP's 911 I would not part it out, margins are to close. Sell as is.
Salparadise, I agree with you 400/412's are great cars. On my 400I, I put lot of miles on it, it was really fun to drive and I drove it every where. It had 72,000 miles on it when I sold it. Almost unsellable with that many miles. If it was a Porsche 911 we would talk about how low the miles were at 72,000.
So I sold the 400I for $25,000, good AC, all the services up to date and it ran very strong, but the miles freaked out buyers. Now I could sell a 5-speed trans with the rear end for a easy $10,000 if not more. The engine for $10,000 and the car with out the engine and trans would have sold for $15,000. I left $10,000 on the table.
Great car but the parts and maintence was consuming me. Here is a picture on a road trip in the winter to New Mexico and me doing an engine out service.