You already have precision measuring equipment. There is no reason to get a special tool. Place the dial indicator perpendicular to the piston top, near the center since you have flat top pistons. Rotate the crank clockwise till you get to max travel and Zero your dial indicator. Now rotate the crank till the dial indicator reads .030, Any number larger than .015 will do, and mark your Vibration Damper. Next rotate the crank counterclockwise till you get to .030 and mark your Vibration Damper. TDC is the center of these two marks.
At .450 lift I doubt you will need to check valve clearance, but it can't hurt. I like your choice of intake and Carb.
