Small block Mopar 2.05 and 2.08 valves.

The head with 2.05’s is on my flowbench right now on a 4.015 bore adapter. [email protected] (he’s running a 575 lift cam). I run 2.08 valves in mine on a 4.030
Bore.
You running 1.600" exhaust valve's? I remember reading that there's suppose to be a minimum clearance of 0.03" between the valves, is this true?