The stock blocks can handle a lot of power, espceially if you're not reving the piss out of them. The revs are more detrimental than the power. My last car had 130K on it's stock short blockand dynoed at 444 rwhp. It was a daily driver with all amenities and ran 11 flat on DR's. It would still be alive today except I didn't back off the timing or add a little race gas to it on a very cold day at the track. Even then, it was a burned piston that killed it and not the block.

The one I'm working on now is almost new...only has 112K on the factory short block. I'm hoping it's as good as the last one. The good part about this one is that with the turbo, I should be making a ton more torque than I was on the last one. That means I can drop the gearing a little and turn less rpm's and it should last longer than the other one did. May not happen that way but, who knows. Take a look on www.turbomustangs.com at what some of those guys are running on stock engines. Som of them are scaring the hell out of 9's with stock motors, big turbos and gears that look like a Florida Interstate number. I won't be heading for 9's 'cause it will still have to get me to work. Tens would be nice though. Yeah, right...that won't happen though...at least not for a while. You know how hard it is to stop squeezing "just a little bit more" out of it.