I am building a flathead for my 1949 Ford. I will be running the famous Isky 404-A radius-tappet cam. The motor will have a 3 5/16 bore and 4 1/8 stroke 284.33 c.i.,Navarro heads and a two deuce racing intake manifold on top. Can anybody tell me about there performance? I hear these cams have wicked idle.