I had one that lasted a bunch of 9.7-9.8 passes....for about 3-4 years. Then one day the cam sensor ring moved and a huge backfire occurred. A few passes later I lost oil pressure. Had a crack that went from one of the main studs all the way to the cam journal. The cam bearing then walked out leaving a huge oil leak inside the engine. When all was said and done, I had to cut the crank 10 and replace one rod and obviously the block. The new block is still going after 4 more years of abuse.
A good tune will keep it going. I had one but one mishap at the higher hp is all it can take. But that backfire I had was huge....I still hear it today lol. I don't think many motors would have come out of that unscathed.
