I like the cushion you have in your p-v clearance. Thats the target(ish) I try for.
Where is your cam installed at?
Here is a Reher/Morrison site for some reading. There are some about gas porting. I'll let you decide. Also a good one about compression.
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rmre start
rmre start
This will get you started. Theres alot of good reading there. Some of it supports what I'm saying. I've had some good teachers for building some hp. It wasn't R/M but they were Prostock champs a few years.
If you could post some pics of the domes of your pistons here I'd like to see them please. Before cleaning.
Thanks , Don