P91473

I have an 80 3.0, and I am finishing up a top end rebuild, the following are questions on cam timing:

First, the book mentions prying the tentioners to relieve pressure on the sprockets. What is the intention of this step?

Then the books says to move both cams until the punch mark on both sides is up? What punch mark? On my cams there are two marks, one looks like a part number, the other looks like a stamped "930". I ended up installing each cam with the crank up at the Z1 mark where I was assuming 1 and 4 were at TDC, so each cam was rotated to have both 1 and 4 valves fully closed. The left cam ended with part number up and the rights cam ended up with the "930" up were the crankshaft was up at the Z1 mark. Is this correct ?

I turned the crankshaft to set TDC on various cylinders and adjusted the valves on the left bank, (1,2,3) to .004 in. at top dead center for the appropriate cylinder. When I turn the crankshaft, nothing on the left side binds, but at times the exhaust valves when not at TDC have more play then at TDC, .004 in. Is this correct?

I know how important the cam timing is and want to be sure and do it right. What can I check to 100% verify the timing is correct?