I had to send the 2 groove pulley back to the Ford dealership that said it came off a 427 engine. It had a small center hole from a small block. I bought a deep groove from Summit sold by Goodmark. They stated it was a high performance. I shall see when I get it. The car is primed and being sanded for paint. Open air elements do not need the decal. Year one used to sell them. I had bought one. NICK L72