Thats what i'm thinking too, he already went 14.3s on street tires & easing on it from the gate, his MPH at 94 should be enough for high 13s with good 60ft. times, that will be better achieved with 4.56 gears, i'm sure theres a couple more MPH left in it, its a SB, they like alittle more gear, i'll agree a 3.91s or 4.11 would be about all thats needed for his combo, but he is going to run a 28" tire, this will be better suited for that 4.56, most run 4.11s with a 26 or 27", so he's close.