Fords aero cars were limited too. The reason was they were just running all together to fast. If they hadn't been limited Ford had a winged car ready to go too, as well as, a 427 OHC v8. They may or may not have continued to be dominant.
it wasnt that ford was limited, 75% of fords racing program was squashed by iacocca. their "winged" car was not a wing car but the King cobra that was nothing more than a nose glued onto a torino. the only way nascar could keep it competetive was to ban the hemi from the birds or knock down their CI. (to 305 and not 355) the 1970 season was only the beginning of total domination until nascar stepped in and cried because the mopars were now running the show and it was bad for business. so teams were going to the 71 B body dodge and plymouth bodies with full hemi power and continued to win. not taking away credit from ford, because without them the birds and daytonas would have never existed. chevrolet wasnt even a factor until nascar brought everyone back down to their level. and yes, i am passionate about it, you can say all you want about ford this and that which is fine, but i think you know that nothing could beat the hemi in a daytona....except nascar as an entity