I guess I'm just lucky.  I couldn't ask for any more out of my Roush 427 SR engine.  I have over 28 K miles with no major issues.  It does use about a quart of 
oil every 1 k miles, has a lumpy idle, but will idle forever in Texas heat, and gets a bit over over 15 mpg on interstate highways.... but I can live with that.  
Wonder how many advertised 525 HP/525 Torque  engines are running mid ten second quarter miles?
Jody