I have Full Size West Coast Mirrors on all of my 1-Ton trucks. I believe they all came factory original that way. You could go smaller if you are going more for looks. It seems like the newer 1-Tons have smaller mirrors. Which ever way you go, I would definitely use a Convex "Spot" mirror on the passenger side along with it, espeically if you will be hauling any loads with it. I use the bolt on kind. I even have a Convex on my pick-up.

Bill


'60-'72 Chev/GMC Fan
GMC 9500 Fan
Detroit Diesel Fan