The exhaust port looks to be plenty large. The intake port looks large enough as well. I may still have to entertain the urge to further widen and polish both ports at some point. The carb pulse port is directly below the intake.

The piston is a 2 ringed pinned design. These rings do not have a square cross section so I may get a set of Bowman rings.

In general I like what I see.

If one or more of the more experienced members here could describe the method used to check port timing I would greatly appreciate it.