72 340 actual hp?

hey i was just wondering what the actual hp of a 72 340 was?
i know the 71 340 was rated at 275 but i herd it was actually ~330 so the 72 was rated at 245-250 what is the actual horsepower? or did they tell the truth on this one.

i am just wondering because i bought a car with a 72 340 and its getting shipped to me right now, so i just want to know what to expect for horsepower and yes the motor is completely stock.