Thanks. I wound up getting my concerns addressed by a visit to the Triumph shop that has been helping me. They showed me a stock 650 with the head removed
and it was worse!! 
Just the way these motors are, I guess. And I also needed to be shown that the clearance of the dome of piston to chamber was much greater than squish band, that is what matters.
I'm wrestling with the pushrod tube clearance/squish right now before torquing head down but I hope to have it all together this weekend. There is a lot more to assemble than the engine but it's coming along.
