Head flow and power differences question / discussion

The first post gives the build so far. What I am trying to decide is which head is the best option.

I understand how the combination of parts work together, that's why I'm trying to make an informed decision.

The car is a '67 notchback, 904 Andrews Racing trans with a rmvb. low set gears built for 550 hp. Converter is an Ultimate 9.5" to handle 800 hp. I have 3:23 and 3:55 gears to use.

The rotating assembly is a Molnar 416 stroker from @PROSTOCKTOM (thanks again).
[FOR SALE] - 416" Molnar Technologies Complete Balanced Rotating Assembly for 340 Block - New

CR will be 11.5 +/-

The cam will be a roller built for this combo.

My goal is to perform better than the 400 hp 340 that is in the car now. Why? Just because.

I will be driving it to church on Sunday but not like mom would and my kids were homeschooled, so I won't be dropping them off there.

If I left anything out that needs to be thought of, let me know.

Thanks again.