Laping the shims worked for me & a regular bolt works fine as a tdc tool.
Take special care as to have each cam in it`s proper place & position (front/rear exhaust/intake); they may not be in their proper place initially & it is of importance. If so
, find the last guy who did the valve job on your ride & kick him in the balls; it may not solve the problem but you`ll feel better & then procede to disassemble the cams and reassemble in their proper position, run the engine & then take the valve clearance measurements & do adjustments. You can pretty much add a day to the job waiting for the engine to cool off completely before starting over again so you might want to kick the guy twice while your at it!