My dad has raced since 1978 I think, he did run a 4 speed for a good many years, but I'd say since the early 80's he's ran a 727. Raced every weekend from April-Oct. My sister started racing in 2000, I started in 2002. All we ever run is 727 with stock internals and a turbo action valve body. We race on 25-40 races a year depending on how many rain outs. We've never had an issue with the 727, but we also shift our cars at 6,000 and don't twist them over 6500. Our cars aren't the fastest typically mid to high 11's in 1/4 with my car high 10's. I know of one guy personally who broke a drum, but the week before he broke the ring and pinion and didn't bother checking the trans. The next pass when he left off the trans brake BANG and it made a big mess. I think as long as your smart about stuff a 727 is pretty stout, just have to be wise in your choices of how you treat them.