Rusty, you are 99% correct.1970 was a gray area with insurance companies and what not.So automakers bent the truth with specs. My brother has a 70 LS6 Chevelle bought new.It came with a "Low Rise" aluminum intake with a 780 Holley.His car is a "Day 2".On the second day after you brought the car home you changed the intake, carb, removed the smog pump,installed headers and Cragar SS wheels.With the Edelbrock "High Rise" and 850 double pumper you no longer could use the stock cowl induction air filter housing.My understanding is the same as yours that the Corvette's advertised HP was 10 more than the Chevelle even though the engines were the same.Not that this has anything to do with the discussion,,Another strange thing about Corvette is in 1973, Black paint was not available.
