NOS 64-66 Ford PCV Valves. These may have been used on HoPo's but I am not certain. I do not see any marking on them.
C5ZZ-6A666-A, C4AZ-6A666-A $12.00 each.
I have Eleven of the Silver C4AZ-6A666-A Valves.
I have Two of the Black C5AZ-6A666-A Valves.
$130.00 for the whole lot of 13 Valves