1970 Duster 340 Project ...

Letting it sit is fine as long as its out of the weather. I have had my '69 Barracuda since '79 so I know where you are coming from. Just remember you never appreciate them until they are gone. Sounds like you don't have the time or money or motivation to restore it now so why not take the middle ground and just get it running again so you can drive it once in a while for old times sake?