Lets talk Roller Cam Lifters.

Ok maybe it's the way the cam is ground????
I found it by the way and here is the post.

many of us were thinking of a conversion to a mech flat tappet so ignore all the lifter size stuff
what matters is what was said on my post 79 about the torque advantages of an inverse flank roller cam- no one else takes the time to final grind and spark out with a 5" wheel
several other "inverse" series are barley inverse - as much as can be obtained with the standard 18 " wheel which is not much
Mikes program takes all this into account
cheeers
Maybe a little bit more explanation on this.