I would have went 4.10s, but here is my problem. A. i dont want to be taching 2400-2500RPM at 65-70MPH. B. I dont want to have to go into 5th gear at 100MPH (main problem). If your running close to someone (say Z28) and there you come up on 100, say byebye when you hit 5th. Even this one guy with 4.10s said he he deliberately shut a race down at the end of 4th (100MPH) because he knew he would get passed when he hit 5th. once you have some bolton you will have to hit 5th at the end of the 1/4...3.73s you can pull to 115 @5400-5500 in 4th gear, leaving plenty of room for growth....you have to be a heck of a driver to powershift (or shift fast for that matter) 5th gear.To risky of going back into 3rd durring a hard shift into 5th.