My 340 build

Gap is about .018 with those for a hot street/ race set up. I think they recommend .004 factor per bore inch. You have .0045. If it's done there, don't sweat it.

Detonation is going to be something to watch out for. Cylinder pressure is going to be high with that camshaft. I would NOT install it advanced. I like that cam with 9.5 max static compression.