Hi, does anyone have a head blue print for a big power junior dragster? Or even a good picture of the combustion chamber? Do these things use flat top pistons, or is there a dome? I'm planning to build a non-ford flathead and going for as much power as possible. The head will be custom built, the bore will be right around 3 1/2, so I thought that maybe I could copy the combustion chamber and piston top design from these 3.5 bore engines. Since they Make almost two horsepower per cubic inch naturally aspirated. Pretty amazing for a flat head