Ok, I need some technical info on CFM and surface filtering area of air filters and engine CFM requirements. My 5.9L V8 360 cid motor is rated: -245 HP @ 4,000 RPMS -345 TQ @ 3,200 RPMS The stock paper air filter size is 13.5" long x 6.5" wide x 1" tall. Three main questions to start with: 1) What is the total surface filtering area be of this sized filter? 2)What is the CFM air flow rate be for this sized air filter? 3? What is the CFM requirements for my 5.9L V8 360cid motor? I have heard that the 360 motor only 'needs' 350 CFM-425 CFM, so 'function'. I just would like to clarify this CFM number. Is there are calculator I could use to determine the CFM for my motor? Lastly, what is the the stock 5.9L V8 throttle body rated at? I have also heard anywhere from 635 CFM upto 690 CFM. Thanks for any and all info on this.