I got some cragars now i need to know...?

ok i just bought some cragar tires and rims for my 1972 el camino and im not going to use the original lug nuts but i dont know what kind or the size shank i need for them to fit, the fronts are 14"/8" tires and rims and the backs are 14"/10" deep dishes which by the way i found out have very little back spacing and they wont even let me start a thread with the old lugs. (why i need the shanks) any and all help will be most appreciated, thanks in advance.