sorting out my set up

Sounds about right for a heavy car on BFG's, here are a few tips.

1. Get some better tires (drag radials) and you'll be in the low 14's.
2. Get some steeper gears (4.10-3.91 depending on how much street driving you do) and you'll be in high-mid 13's.
3. Leave on the last amber instead of green an you will have a decent light.

With the 98mph trap speed, unless you change something on the motor to increase power, high-mid 13's is probably all you will see out of this combo.