Dry and light tan is how they should look. Lean will be white... where in Iowa are you? I am over in Omaha, NE
I am running a 2:1 carb system and have long ago forgotten what my stock jets were, but by plug color alone you should be good... use your own judgement... remember that a rich condition can hide an underlying lean condition, confused... read the Banshee Jetting FAQ... it's pimpalicious!