Ok I have a few questions.... what was the difference between the 08 and the 09 engine... for some reason I get the drift that the 08 is the better engine to run as a carb engine.... the reason I ask is I would like to build up a twin turbo gen 3... what parts are interchangeable between the 08 and 09... or the 5.7 and the 6.1 .. also how do the bores stand up for wear.. I can pick up a 04 5.7 real cheap BUT it has 120K on the odom.... any thoughts