Valve to piston clearance?

This graph might be helpful in visualizing this. It's a graph of piston-valve clearance in a standard stroke SBM with a cam profile I found on the internet for a [email protected]" cam. (Actual lift profile is for a SBF but it'll be very similar in the area of the minimum P-V clearance IMHO.) This is approximate for a flattop piston as set up by the OP, but with a bit different cam:

• longer duration cam
• a bit more advanced (ICL at 105)
• still a fast rate cam (44 degrees duration difference between .006" and .050" lifter lift points)

This is just to help visualize things, so should not be taken as a general rule for the the actual clearance you would achieve in your particular engine, but the crank angles for minimum piston-to-valve are generally correct.

It confirms the info presented by Duane. Vertical scale is clearance in inches and horizontal scale is degrees relative to TDC. This is for the intake valve.