http://nostalgiagassers.com/nhra-rules-gas-coupessedans-g-1965/
"Engine: Automobile engine required, however, year, make & model are optional. Any modifications may be made so the engine and/or component parts including clutch & flywheel. No more than one engine permitted. Engine may be located but not to exceed 10% of the wheelbase as measured from the centerline of the front spindles to the neaest spark plug hole. Engines may not be raised more than 24 inches from the ground, measured from the centerline of the front crank pulley to the ground. Rear engine location is not permitted in Street Section, unless it is an originally produced manufactured rear-engine car, retaining original engine.Modified-engine Corvairs compete in Gas Coupes/Sedans classes. If modified and blown Corvairs compete in the Superchared Gas Coupes/Sedans."
You or anyone may build their model(s) however they wish and call it whatever they want. However the rule is unambiguous.