There is no dual fuel. Only Propane or Gasoline. The propane tank is where the normal gasoline tank would go. The spare does fit higher on the Propane car as the wooden bracketry is removed and the spare wheel mounts directly to the propane tank.

I have converted a good number of US (Bill Fink) propane cars to Gasoline. Both Plus 8s and 4/4s. Not all that difficult. The hardest part is creating the wooden bracketry for the spare wheel.

Cheers,
Mark

Mark

1934 SS MX4
1938 Series 1 DHC
1951 Plus 4
2005 Roadster