which gear ratio for 1/4 mile

i have a 71 dart,maybee weighs 3000lbs,440,727,680 lift cam,31x13 slicks,broke my dana 60,and getting new gears,has 4.56 in now,car ran low 10s with them at about 7200 rpm at the strip,would 4.30s make a differance as im looking to go into the 9s next yaer