Hello; If you remove the lifter for the intake pushrod, rotate teh camshaft until teh hole in the cam lines up with teh lifter bore. At that point I use a pushrod to pin the camshaft still.

Still there? Rotate the crank until it's at top dead centre, lower the cam case onto the crankcase while holding the pushrod in the intake lifter bore. wiggle it aound, do it again, whatever it takes to be sure it's done right. After you've done it, you'll wonder what all the worry was about.

All the Saitos I have had apart(lots) have had that drilling on the intake lobe of the cam. I have made , I think 4 little tools to do that same job, where do they go?