Race what you want but back in day of the late 60s and early 70s I looked for 440 and hemi powered cars to race with my 340 Duster on the street. Most of the hemi's in particular were less then spectacular. I raced several Hemi powered cars on street and won. I was running modified dist and carb nothing else and I could really shift a 4 speed. Now I watch the new Hemi cars in 11s or better so trying to compare the old big blocks and small blocks ? why race a old Hemi when the new hemi one will be a winner stock? Face it times are changing and the cars are just plain faster , but that doesn't stop me from racing the new ones too If they are supercharged I say nitrous! But do what you want !!