You have a very low first gear and rear gear combo. I would go with a 26x10 stiff sidewall mickey thomspon. Any taller and you are hurting your starting line ratio even more. As you can't change the 1st gear in the transmission I would recommend a steeper rear end gear. For comparison I run a 3.41 first gear with a 4.56 rear and a 28 tall tire. 1.3X 60 foots all day long.
Dart based 363, home ported TFS street heads, and a small cam (Anderson N112) 10.43 @ 127
2011 UMTR North Street Stick Points Champion
2014 UMTR North Quick Stick Points Champion