My last set of king bearing gave a 0.003" clearance for the main #5 and .0025 for the others.
Holy fuck, why? Unless you're running a dedicated race engine that sees well over 600whp and over 8k, theres no reason to go over .002".
Don't worry about which brand of bearings you should get as they'll basically all the same. Worry about your actual clearances. Measure them with calipers at the very least. It'll be a lot more accurate than plastigage.
Go with .0015" for 1, 2, 4 and 5 mains, and a little looser on #3. Then go with .0016-.0018" for the rods. Shim your oil pump relief valve slightly and you're set.
And I doubt your clearances on the motor you brought to the meet exceeded .0015". If they did, your motor wouldn't of had locked up like it did.