Original engine, stock except for the cam and longtubes. Made 382hp at the last dyno tune and between 8 -8.5# of boost. I'm using the original blower pulley and a 7" crank pulley. I have a smaller 3.25" blower pulley sitting on the work bench, but haven't worked up enough nerve to put it on yet. I don't know how much that would raise the boost, but I'm guessing to 9-10 pounds. Think that stock bottom end would be ok with a little more boost? Timing will always be kept in check, and my tuner likes to keep a/f 11.5-11.9.