What would you do?

I am new here, but no stranger to the 65-66 mustangs.
Here is my question. I found a true survivor a 64 1/2 mustang ,rust free, dent free 260 v-8, 3 speed. The only thing missing is the original air cleaner, it currently has headers but the original exhaust manifolds are in the trunk.
I got it home already bought and paid for. Actually I also got a parts car with it. Same thing a 64 1/2 but a rust bucket as far as the floors go, nothing I would care to try and fix, but with a lot of extra parts on it . perfect fenders,doors ,trunk lid ,end caps, power steering stuff, that I plan to eBay.
Should I also eBay the rust free ,dent free mustang and let a classic restorer have it or go ahead with my plans and drop a 289 and a 4 speed in it and resto- mod it?
The car is a outside , inside paint job and new carpet from being a restored mustang, everything I mean everything is as it left the factory down to the original wiring and generator, cigarette lighter.
Its what a 64 1/2 mustang would have looked like in 1968.
I know I am that old. I been feeling guilty about taking this one apart for some reason.
What would you do?

Thanks Rbohm,
I am taking your advise an leaving it unmolested, but as part of the family. Going to be seeking another one to hot rod. I looked over the parts car and it is way to far gone to fix economically. As cheap as the 65-66 coupes are now due to the recession.
I kinda knew in my heart that was the way to go, and your input helped.
By the way I am located in Phoenix.
(Edited for spelling)