A buddy of mine just bought a bunch of mustang parts, he got a set aluminum heads with the parts. He wants to sell them to me, but I need to find out what they are. The guy that sold them says they are AFR heads, but they don't have any AFR logos anywhere on the heads, or any other logo for that matter. They are fully assembled and look like AFR's from the top. The only number on them is: SN 30792-3. Anbody that can help?