They really are sub par cams every lobe I have checked has been different , there all based on works cams , but the centreline is different , also seen them hard on rockers , there is lots in fitting a big cam , much care has to be taken in setup , if you want the best hot road cam the 1308 wade is the go but it has to have 3/45 carbs and head work and springs and retainers , this works in the mid from 3500 to 7500 in a 2.8 to 3.2 , Owen has one , ask him how it goes