Too much gear?

340 stock compression,474/280 cam i had 3.91 and my buddy with a 383 dart had 4.10 gears and need lower one as well. Told him that i would have some 4.56 gears put in place of my 3.91 and if it was to much we could just trade.............. installed them........well he didn't get the 4.56s. they worked too well to trade! LOL. Gears were perfect! 6,000 shift 6,000 shift.......shift like came on as i when thru the traps at the end of the track.