How much is too much?

[koryh2009]

i am purchasing a 7MGTE here in the next couple weeks and the seller of the motor filled me in on some of the stuff about the motor. before he pulled the motor out, he was pushing out around 500 HP on stock internals. i know that the stock internals on these motors can handle a lot, but what kind of damage can be brought on by this if at all? also, another thing he brought up was that it knocked between 3500-4000 RPM. im thinking that it is a rod bearing, but who knows until we tear the motor down! those are just a couple questions that i have. Thanks!