Well...you have responses from young guys, old guys, dynomometers, racers, magazine arcticles and the
ratings the factory provided. I'm betting you're having a tough time deciding what your number might be.
Seems like he's got two choices agree with the ones that think a 340 can't respond to basic upgrades like cam intake and headers and think it makes under 300 or that it does and is making like around the mid 300's.