Re: Timing mark Pointer
O.P., you specifically asked about using a dial indicator....and that is a valid method. However, Boobie hints around at a very important point.
It is important to remember when using the dial indicator, that there is a "lag" or "dwell" at TDC where the piston doesn't really move up or down as the crank journal rotates thru the "topmost" point in the circle of it's travel.
I am not sure exactly, but I would recon there is maybe 4 degrees of flywheel rotation where the piston is not really moving.
You will have to remember to account for that "lag" or "dwell" when using the dial indicator.
As Boobie suggests, the piston stop tool, used along with measurements taken directly off the flywheel is probably a more practical method. The exact procedure when using a piston stop tool is explained in the factory service manuals.
(I once had a piston stop tool installed, forgot/accidently hit the key, engine turned a full revolution and punched a divot in the top of #1 piston, as well as totally eff'ed up the spark plug hole threads in the head.) Just a fair warning.