Jim, Every public document (invoices are not public) that Pontiac produced referred to L74 as HO. As I indicated above, the general hobby often refers to L74 as R/A III. But Pontiac did not.
Ahh, but you are wrong. Pontiac did refer to the bare L74 as ram air. Did you forget about the invoices already? LOL That's why I posted them over and over. You tend to ignore them.... If a person owns a 1st generation Firebird and has the original invoice(or verified copy)AND it says FIREBIRD 400 RAM AIR on it..... Are you seriously going to tell the owner that it's not what the invoice says it is? I'm not.... When you look at this debate in general terms it's your textbook 'Inclusive' vrs 'Exclusive' debate. I've always been an 'inclusive' type person.