[mrlaser]

I have now finished checking valve install height and setting valve spring pre-load via a spring scale and shims. And while I did follow the suggestions offered by Cadillac512 regarding cam timing verification, I would like to be sure that my current assumptions are correct before reassembling the heads and intake. TDC was established by bolting a plate across number one cylinder marking the crank pulley in both the clockwise and counterclockwise direction. TDC was determined to be 1/2 way between those marks as seen on Marts video. It also coincided with the "bump" on the crank pulley being opposite the existing pointer. At that time both valves were closed and the proper valve lash was present on both valves on number 1 cylinder. Number 6 piston was at also at TDC at that point with the exhaust valve closing just prior to number 6 reaching TDC and as the engine passes through TDC the number 6 intake just begins to open. This is my novice understanding of "valve rocking". I have seen some mention of valve overlap in other threads, but I am not seeing any point during this transition where both valves on number 6 are open at the same time. I am wondering whether this is more of a phenomena seen with higher performance cams? The cam in my engine is of the stock variety. I am new to most of these issues and want to be sure that the cam timing concerns have been properly sorted before moving on. I greatly appreciate all of your suggestions.