Eric UD Harold has sold Utradyne and now is the head camshaft guru at Custom Camshaft Co. That man really has a mountain of knowledge in his head and is good to deal with. I bought an Ultradyne flat tappet from him before including springs, retainer, and etc which I have never used. I decided to go with this hyd. roller cam instead. Also removing my new open pleniumn torq II manifold electing to go with a RPM air gap manifold. So many new unused parts to sell...I will be happy when this build is finished and I can enjoy the ole A-bone roadster.