In lookin for past nat record holders, I ran across this little GTO that held a nat record for 5 years straight !
http://www.2040-cars.com/Pontiac/GTO...holder-185350/
I suppose this car & Bill Rink's '74 GTO are the reason for the high hp factor, on the '74 200hp 350 engine. The '77 350 has a much lower factor. Even the low compression '77 400 engines have a lower hp factor than the '74 350, in all bodies except Birds.
http://www.classracerinfo.com/Engine...8&MAKE=Pontiac
http://www.classracerinfo.com/Engine...4&MAKE=Pontiac