http://s57.photobucket.com/albums/g2...00/For Sale/ These are the 170cc Trick Flow Twisted Wedge Heads for a small block ford. I believe they are 61cc. I bought these heads from a guy who had these on his mustang and it dropped a valve. As you can see, one of the chambers has to be repaired. These are stud mount heads with the dual valve springs. What you see here is what you get. They would probably need to be disassembled and inspected. Looking for $400 + shipping for the pair. I am in Rockford, IL which is an hour west of Chicago, if you prefer local pickup.