Re: 454 Hours question
 

By the way, a compression test really tells you nothing. Something really has to be wrong to show up on a compression test. My engine still had ok compression, but it was obvious the motor was sick. A leak down test is what is in order. A leak down when performed by a competent mechanic won't lie. In fact it'll put the enigine under a magnafying glass and make some insignificant things seem terminal. The interpretation of the test is just as critical as the test it's self.

Re: 454 Hours question
 

Oil change records is they key.
7.4 chevys are bullet proof as long as they are left stock.