I took my engine apart for a refresh 331, SRP pistons, flat top with two valve reliefs, had old world product heads that are going to cost more to rebuild than worth. Would like to reuse my stud mount 7/16 arp studs and rocker arms also. Some people say you cant use TF heads but some say you can, my cam is Comp cam by Ed Curtis duration @ .050 is 219 intake and 231 exhaust, gross valve lift .594 hyd roller. I notice lots of heads have the 3/8 stud mount not 7/16. Just wondering so I don't waste money trying to find the right heads, taking suggestions?