Will I regret change to 3.55s from 2.76s

I'm Running a 360 mag. with a cam a little larger than stock 600 cfm carb with 391 gears. It runs as fast as I want and looks great. The last thing on my mind is gas mpg plus the additive I use. If I can't drive there I will trailer it. I love my car and don't worry about price cause it takes what it takes to look cool and go fast. I would stick in the 355 gears and by a pinto for long trips. LOL. Just have fun with it.