Well my 7M broke after about 200 miles the first time, lol. I had a mazda rx-7 that i rodded waaaaayyyyy harder and it never broke, i would burn a quart of oil a week. My second motor i babied considering, and the headgasket gave after less then 500 miles and it was on 6 to 7 pounds! Don't get me wrong i respect the 7m but i hate having to worry about if i floor it i could blow a headgasket, especially since i plan on drag racing it. Of course there are precautions you can take,but i don't want to worry about if my head was machined good enough for a mhg. Money is no big deal to me, i have patience to take a few years on it.