I don’t put a lot of stock in valve shrouding from what I’ve witnessed. My Edelbrock heads with the moved pushrod hit 332cfm on a the 4.015 bore size with a 2.08 valve. My other set without the pushrod moved hit 318. My 360-1 heads were tested on the same bore size even though they went on my 4.100 R3 block.
Since we're not too far apart, I'll keep you in mind if i ever have these off. Be neat to see how different they are, or aren't compared to the indybrocks, and the few other heads people compare them to.