wheel to gear ratio

Hello all. Looking to buy a new set of tires for my duster. Presently I have mt sportsman pro's 29x15.50x15 and a 4:10 gear what changes would I get if I went with a 28 inch tall mt street radial with that gear or should I stay with the taller tire and switch up to a 4:30 gear. The car is a street strip car. Drive to the track and run 12:50's put the air cleaner back on then drive home. Just curious Thanks Jerry