That Vic motor is essentially an '86 Mustang HO spec motor, with cast pistons and a wimpy cam, but it is still a roller. If you are going to use it, upgrading to E7's(check p to v clearence), an '87 upper intake annd tb, and an '86 and up Mustang HO cam. BTW, the cams that came in '82-'84, and '85 CFI Mustangs that is commonly reffered to as the "Marine Cam" is actually from a '72 351W Torino, the "Marine Cam" was considered, but never made production in a Mustang.