Taken from the 1965, Official NHRA Rule Book pertaing to the Gas – Coupe/Sedan Class aka Gas Class or Gassers for short.
1965 Official Drag Rules
III Street Section
The street section is for “dual-purpose” cars capable of starting under their own power. Cars in this section must be capable of being driven on the street. Bodies, engines, drive trains, etc. may not be altered, moified or relocated except as noted in class requirments. Push starts not allowed. Return to the pit area by use of a push car is permited, Return to the pit area by use of a push car is permitted with any supercharged Street Section Car.
Any pre-1960 unblown 4-cylinder automotive production engine woth any type head and any year Chevrolet 6 cylinder engine with stock production type head may compete in the flathead classes of this section.
A. Gas Coupes and Sedans Division (G)
Seven (8) classes of competition in this division for non-supercharged cars. Class is determined by the total car weight divided by total cubic inches of engine displacement.
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