03-17-2009, 08:19 PM
They could be either 53 or 63 cc chambers. Most likely they are first gen 302 design. But could be 4V heads if the chambers are 53cc's. Don't know what a street value would be. They would definitely be worth more to someone doing a #'s matching resto. If your wanting to use them for performance, it would be much cheaper and easier to buy aftermarket and achieve better performance.
'72 TBA...