I was thinking you should look into the pistons I am thinking about (posted near the top of this topic). But when I saw you want to run pump gas, I am sure those pistons would give you too much CR.
I haven't even sent the block to the machine shop yet, so you likely will do carb tests before I do. I look forward to your results.

P.S. I remember an old post of yours about using 7/16" dia pushrods. And that post helpped me decide to go that route.