Originally Posted by blackbeast12
There's alot of threads all over the mustang forums of guys popping these engines at 650+hp the real test is can they go 80k miles at over 700hp..time will tell!
If you want to get 80k miles out of a Ford you better not mod it at all. I know what you're trying to say, but most people have a realistic expectation that adding power over the stock level will shorten the lifespan of the component significantly.
Build it, race it, break it, fix it. That's how it goes, if you aren't ok with breaking it and fixing it, don't mod it.
I also agree with Grabber though, the tune is key. The people who have blocks and stock internals surviving on 700+ RWHP are likely on proper dyno tunes, not mail order tunes that involve some guesswork.