Spark plug recommendation for carb'd 5.9

Getting close to dropping in my 5.9 but have no idea about spark plugs. To just go with what's stock for a 5.9 or if there would be a better choice. Basically stock 5.9 except edelbrock airgap manifold, edelbrock 1406 carb, and doug's headers. Also I'm at 5300 ft altitude.

What would be a good choice?