Will I regret change to 3.55s from 2.76s

You need 3:55's with 2:76 gears and a 27 inch tire. With the tall tire's it will be more like a 3:21-just right
I've also thought that if I shimmed the front spring hangers back 1/4-3/8", I could probably fit 28's if I wanted to drop the cruise rpm some.