Nice concept, but I feel you have to look at the competion. The Haybusa runs in the H engine class.
Bockscar H/FL 228.039, H/GL 228.039

Hardman H/BGL 198.859

Jones / Geisler & Zickrick H/BFL 160.577

Very classic design. I'd look at the aero at that speed. The short wheel base isn't the answer. The tail fin adds stability.
I'd put a turbo on it and run fuel. The H/BFL record is the slowest.