race carb 410 stroker

What is the cars weight?
Did you dyno the engine?
Where does power fall off at?
At 5700, is that your max rpm?
I was wondering if you could pass the line at a higher rpm to lower times. An example would be a smaller tire or more gear like a 4.10 or 4.30. Which may not be helpful. Depending on your engine.

The 60' times need to be dropped!
That would be my first area to attack for a better slip. I believe that your right there. About to do a high 11.