Tire and wheel opinions

Just got my 69 Dart on the road this spring and took it to the track this week. Stock magnum 5.9 efi, 833 4spd , 8 3/4 3.23 sg, 14 x5.5 sbp wheels with 205/ 75 tires. Best time was 15.68 @ 93 mph. Obvious traction problems. This is a daily driver that I am keeping mainly as is (probably some engine mods down the road)but would like to get the most out of this combo. Suggestions on rear wheel tire combo? I was thinking 14 x 7 or 15 x 7 wheels. Drag radials or street tires?