No to 2.02 valves in a 318 bore. You might have to notch the block just to have it not hit and if you do get them in the shrouding would negate the value of the switch.
2.02 + 1.60 = 3.62 is a 3.91 stock sized bore. They fit and work.
Valve shrouding should be avoided however even the factory offerings across the board don’t worry about valve shrouding. It is just not that big of an issue and means near nothing in an everyday street car.
Worrying about it is BS. Suggesting to be worried about it is BS.
One of the very if not thee dead last as cast heads I’d ever use.
Now if you port the F’in hell out of them…….
Nearly everyone fell for the BS that the 302 head was a magic head and used them as cast. Few admit to crying over the switch.
When you port the crazy *** crap out of the head, then! After all that effort, you’ll have a kick *** head.