Original 318 worth keeping??

So I finally got my new 360 Magnum in my '70 Duster and I'm wondering what to do with the original 318 I pulled from the car. I was thinking of saving it and someday (at least a few years from now) building it into a turbocharged engine and dropping it back into my Duster. However since my parents' house where I keep all my car stuff is selling I either need to get rid of the old 318 or put it in semi-permanent storage. First thing, how much does a 318 shortblock usually go for? It needs an overbore and full rebuild, think I could get $150 out of it? And then how big of a deal is keeping the original block to my car? I am aware that hundreds of thousands of 318 Dusters were made so I feel like the car wouldn't be worth all that much more if I kept this block vs. just finding another 318 core to rebuild into a nasty turbo engine. Let me know your thoughts I kinda need to figure this out within the next week or so...