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The easiest way to know which cylinder is on the intake stroke for TDC mark is to observe the intake valves of 1 & 4. The intake valve that is starting to open is the one you want to measure. Once it's set, rotate 360 degrees and measure the other. I always start with #1 and then go to #4.
When you install the pins on the cam chain gears with the dots straight up and with the crank @ TDC, you have established rough cam timing and the engine will probably run. Past that setting you are fine tuning the cam timing.
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Tell it like it is or don't tell it at all.
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