It's like the "prostock" theory that I heard go around about 1990, basically the floor was a ramp down the backside of the valve at whatever max lift was accomplished. I don't
think anybody is still clinging to that. Well, almost anybody....................
There are stock ports that have almost no SSR, & work best by maximizing whats there w/a clean break at the floor, so the transition from utilizing the SSR to bypassing
it is as narrow as possible.