Start by removing #1 Valve Cover>
Use the Pin to find TDC #1 JUST FOR REFERENCE
Back the engine off 1/4 turn (counterclockwise from the front)...
Loosen one of the valve adjusting nut and tighen the screw down all the way.
Now, Being very careful roll the engine clockwise until you feel the piston hit the valve.
You will need to make a pointer out of a piece of wire and use one of the oil pan bolts to fasten it, make it point to the damper.
Mark this location on the damper.
Back the valve adjuster out and roll the engine CW 1/4 turn.
Screw the adjuster in the same amopunt as youe did before. ( I forgot to say you need to count the turns so that both times you do it you get it screwed in the same)
Roll the engine CCW until the piston hits the valve. (CAREFUL!)
Mark the damper.
Now you should have two marks on the damper, measure the distance between the marks and find center.
Mark the center.
T he center Is EXACTLY TDC as long as you screwed the adjuster in the same both times.
Make sure that every time you roll the engine CCW roll it at least 30 degrees past TDC before going CW or stopping, this will take up the gear lash between the crank, cam , and pump gear.
Hope this helps
let me know if I need to clarify anything.
Adam