This is just my opinion; if you’re installing a big bore “ kit” from a reputable company, as opposed to buying each individual component yourself, and you’re not trying to build a race motor that extracts every last fraction of power from the rebuild, then I don’t believe that you need to check squish. Unless you’re intending to modify the squish band angle or clearance on purpose to cause some small amount of extra turbulance, then I don’t think you need to bother with checking it.
I just finished a 110 build with the S&S cylinder/piston kit and head work done by Dan Vance. I didn’t perform a squish check during assembly. Again, this is just my opinion. A tried and true big bore kit, with known cam lift, should not have concerns about clearance. If you’re installing a high lift cam and/or milled your heads to bump up compression then of course you’ll want to make sure that you have proper valve/piston clearance.
