What If Build Ideas...for Land Speed Racing

Why don't you turbo the 383?
That puts you in a different class. BNI/SCTA breaks cars down into:
1: vehicle type; vintage, lakester, streamliner and a bunch more.
2: engine displacement. They break it down in ranges.
3: NA or Blown
4: fuel; G is gasoline (sold on site), F for fuel meaning alcohol, nitro, diesel.
If you get a rule book it breaks it down so when you see 3 or 4 letters on the side of a vehicle you can figure out exactly which category they are running, engine size range, whether supercharged and an idea of the fuel they are running.
The serious people try to pick an engine combination just under the displacement break.
Over a displacement puts you in unlimited. For stability I would think a front wheel drive Toronado or Cadillac, poked and stroked would work. Would need a set of real tall gears in the differential. My reasoning is that with the salt being kind of slippery, if you break traction in a RWD it is easy to spin out. With FWD the car still stays fairly straight.
The goal for many is to go over 200MPH 2 days in a row to get a 200MPH hat. There are other hats for 300MPH, 400MPH and 500MPH.
It can be an expensive hobby and the faster you wish to go the cost goes up by exponents.