i just pulled the valve cover, i cannot tell what brand anything is, i see no markings.. but i did notice that on the side of each valve the side is kind of notched out... like there is a pair of valves, then a little seperating wall, 2 more ect... the wall looks like it was shaved around the valve on all cylinders, and it doesnt look stock either... is this standard with aftermarket valves? would this mean there over sized??