[57sailplane]

i ran your combo on some calculators and here is what i have come up with just out of curiosity.

with 428 hp and 3840 lbs your fastest calculated time and speed was 12.10ET at 110.70 mph. to get that speed and mph through the traps you would need a 4.59 gears with those 26 inch tires.

now to get an 10.80 et with the 3840 lbs you need 602.49 hp. which gives you a speed of 124.06 through the traps. to get there with the 26 inch tire you need a 4.09 gear. with a 30 inch tire you need a 4.72 gear.

i am no expert just a bench race junky and this is just perfect world calculations and is by no means a solid true statement. just calculated guesstimates but may give you an idea on things.