I have dealt with Dave for years, he can pretty cranky at times but for the most part has really helped me out. Many years ago I switching classes and called him with the rules to the new class, he told me to give him a few days and sure enough he called me back with a list of parts I needed. I was very competitive with that motor. He really has some good articles on cam installations, cam timing, oil systems. Most guys probably know most of this but it is good reading.