TrickFlow heads. 2.05 or 2.08 intake valves.

Bewy said

Will there be flow loss from shrouding from a bigger valve? Sometimes bigger valves in some engines become self defeating....

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My small block fixture on my flowbench measures 4.010 so I know that a 2.08 valve test good because I’ve been in the 320 plus cfm area with a 2.08 valve. I run my blocks at 4.030-4.040.