No myths on this post that I can remember now to post about I have found that every BB Mopar that was raced at the track or dyno tested that I worked on like more air It didn't seem to matter if it was from the carb. size, camshaft, exhaust system, heads or a combination of some of those listed or all of them I have not managed to make less power or go slower by increasing the air flow and fuel supply Now, about them excellent Mopar brand Purple shaft street hemi grinds or any of the rest of those cams, have any of you found any of them that worked well