There's a pair of 392 Hemi heads for sale locally and was wondering if I should snatch these up and possibly resell them, or possibly hoard these for something for a later date? Is there a fair amount of value in these heads? What could I slap these on? Is there a guy out there with a block waiting for these date coded heads to fulfill his/her ultimate dream of having a cool Hemi? The casting #'s are 1731528-1, 1731528-2 Any and all input would be appreciated!! These are supposedly from '57.