Block: Chevrolet Big Block, Chrysler B/ RB or Chrysler Hemi-based engines. Cast iron engine blocks only.
Cylinder Heads: OEM or aftermarket. Iron or aluminum with common wall intake ports.
Cam/lifters: In-block, any style. No overhead cams.
Oiling System: Any
Cubic Inches Limits: Supercharged = 475C.I. max.
Naturally Aspirated = 525 C.I. max.
Blower: Must be Roots type Blower
Fuel: Gasoline only, no additives(nitro)
Induction: Any (except Turbochargers). Intake manifold must be cast (no sheet metal)
Estimated Horsepower: 875-925
Estimated Top Speed: 100+