360 question?

bump...here's the deal...Ihave a thermoquad at home but needs rebuilding...360 cubic inches * max rpm 5200 = 1872000/3456= 541.666667 cfm....found that off a website. So I'd assume I'd run like a 60 or 625 cfm....I got a loan today and I'm ordering all my parts 2nite...so lmk what u guys think...get a rebuild for the thermoquad or try the 625 or 725 speed demon?