Sorry, but I have been on the other side of one of these deals. My ex got a 71 442. 455/4speed/ac etc. convert. Then the dumbass sold it for $5000!!!!!!!!!!
I guess this thread just brings back bad memories. Maybe the thing to do would be call the previous owner and see if he wanted it back for $500.
Always remember this, what goes around, comes around.......
I really don't mean to rain on your parade, it is just I have been there, know the feeling.