CNC Dude - I finally got home last weekend. The buick st8 engine I have, has a 31-5/16" long head and a bore of 3-1/8". Guess that would be a 248" with a over bore. Now that we know it's a small engine. Do you have or know where I can get exhaust and intake flanges? Or does someone make headers for it? Next I need to get it apart. It's time to get the wooden dowels an 5 lb hand sledge out once I get the crank out. Later Norm