I lot of guys were saying the same thing about B-bodies just a few years ago. Look how many of them got parted out and look at what they're worth now. I bet many wish they hadn't chopped them up because of the way prices have skyrocketed lately.
It's only a matter of time before A-body prices start heading that way, if they haven't already. It started with the E's. Once they were too high, people moved to the B's, and now the A's (and even C's) are inching up.
If you're not needing the money, I say do a little bit at a time and either 1) sell it when the A-body market comes up or 2) continue the restoration to whatever level you see fit.