its hard to know on here who's right, theres no (use this set up and your dead on), i gave u the formula to help u figure it out, elevation, climate, pipes, motor set up all play apart in jetting. As for the V-FORCE 3's on a stock motor you even have the stock air box.i know alot of guys running them on there 421 cubs with alky all im saying is its an over kill. u would'nt put an 850 cfm double pumper on your stock 350 car motor would u. whos running the v-force 3's (banshees that are making over 70 hp) or for finch motors that are 50hp and up, in any case there built motors not stock.