My son had 2 of them. The super 60 turbo engine shown was in the black GLH It hauled ***. That thing would blow the front tires away at random. The super charged car was a hole shot car. Flat out let the clutch fly and pull gears without leaving off.
The 500 worked we ended up putting a 4bbl Carter competition series on it. More power at max RPM but dead on the bottom. Steve made all the adapters and parts. including the VW beetle proform distributor.