Jerry, I started ordering parts from Scott last February. Then I decided to let him build it , so I sent the heads back to him. I had already sent him my block to do the machining on it. He does Great!!! work. He works alone, so it takes a while to get your engine built. Joe, it has 30 mm carbs on it. I had ordered 32,s before I talked to Scott about building my engine and had him weld tubes for the 32,s in my heads. Then the 28,s were too small for the pipes in the heads, so I had to go with 30,s. I need to call frank Johnson about building me a prop now.