Which Mopar engines breathe well enough to make use of 7000+ RPM?

340! good oiling mods, steal crank, forged slugs, a big cam, big valve/big port head ported, free flowing exhaust and good intake n carb! if that dont spin up high or fast nuff for you then put a D-stroked crank in it,like a 3.00 crank in it and shoot for the moon!! my 340 turned 7500 day in and day out 9+ years never an issue! had a 318 that swing 8000 but 1500 miles on it and bearings were toast!