What parts are worth keeping off of a /6

Hey guys i had to pick up my /6 and transmission from my dads work where it has been sitting since we pulled it out of the demon. It has been sitting under a tarp for the past 6 or 8 years, not sure the condition of the internals but it ran when it was pulled from the car. My question is what parts are worth keeping? I have no immediate plans for it but i was going to at least tear it down to the bare block and put it on a engine stand so its easy to move. Its a date 10-10-70 block. I figured only thing worth keeping is the crank? Intake and exhaust manifold im assuming arent worth keeping? Cam, push rods, valvetrain, pistons all probably not worth hanging onto?

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