Hey guys I want to get everyone's opinion on this one. I have a '69 RR that I am currently restoring and I am trying to decide what gear ratio to use in the rear end (currently a 3.23). I want to be able to use it on the street for cruising, but want to be able to light up the tires when I feel the need. The obvious choices are 3.55, 3.73, or 3.91 for the set up but I have only driven a 3.91 other than my 3.23. I am afraid a 3.91 might be too low and give me too high of rpm's with whining going down the highway. SO I am thinking that narrows it down to 3.55 or 3.73. Any opinions on which is better or is there even a noticeable difference between the two? Thanks for helping out!!