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. . . IN FACT, WHATS THE ROCKER RATIO ? lol... where is that spec located on rocker geometry



A stock 440 rocker has a 1.5 ratio. What that means is the rocker arm opens the valve 1.5 times more than the actual lift of the cam lobe.
In the examples above a cam that has a lobe .334" high will open the valve .334 x 1.5 (rocker ratio) for a total of .501"
That same cam using a 1.6 ratio would open the valve .334 x 1.6 (rocker ratio) for a total of .5344"

NOTE: Caution should be used when changing cams and rocker ratios because without pulling the heads and checking for clearance you may cause the valves to extend so far the piston smashes into them.

No need to pull heads to measue valve to head clearance. Very easy to do with heads in place.