Power isn't everything. It's a lot, but it's not everything. I found that I had to compromise the handling of my Cobra just so it would hopefully stay on the road when accelerating in a straight line.
The acceleration is fun - no doubt - and the look on passengers faces is always a laugh, but 300hp Cobras would go around me mid corner on a racetrack like I was driving my old Fairmont.
My latest thought is that a 500hp small block with top $$$ suspension would be the ultimate - something like a JBL or Kirkham 289 FIA / 427 hybrid
