Time for a science experiment....Putting a heavily ported L31 base and a 48 lb/hr spider on my L31 based 11:1 aluminum head 383. Goal is 500 hp while staying truly emissions legal with functioning EGR. Will be keeping the factory airbox into the 4" air intake and 100mm MAF and transitioning down to the factory 3.5" opening on the throttle body bonnet side of the MAF. Emissions legal thorley tri-y headers and high flow cats will remain in place. Keeping the big Lunati bootlegger cam and 1.7 rockers because it idles dead smooth with the Rhoads V-Max lifters. I am also pulling the coil per cylinder setup for now and going back to my Davis Unified ignition coil and module and a set of 8.2mm Taylor wires. My goal is 500 hp crank or 400 hp at the tires with the "factory" L31 injection setup. Mainly because the LS swappers say it cannot be done. If I can find a 4L80E trans segment for the same operating system as the 2005 mexican 5.7 Vortec Green/Blue PCM file I have I will be running an 05 Van PCM with true flex fuel capability using a cheap 3.6 Impala flex fuel sensor. This engine will basically look like a stock L31 with new intake hoses, headers, upgraded ignition, and perimeter bolt valve cover swap. I want the dyno operator scratching his head trying to figure out how a naturally aspirated vortec 350 truck engine just put down cammed 6.0L power. I know an aftermaket intake will make more power. Thats a given. I just want to find out where the real limit of the L31 truck intake setup is. Definately way higher than the 300-350 crank HP most seem to believe.