I finally received all the materials I need to start construction of the jig for drilling the steam holes in aluminum heads that will be on a 400 small block Chevy STREET performance engine. Today, I give a concise description of what's about to happen. I'm sorry about the sound being a little muffled at the 17 minute mark. If anyone is interested in REAL performance cylinder head tips go to    • % Golden porting rules - part 4 of ru...