No factory mustang came with Aluminum heads, but Cobras had better heads "GT40's".
Also Explorers had a variation called the GT40P, these can be found in 1996 to 1998 5.0 Explorers, these heads require special headers which are sold by MAC and Ford Racing Performance Products (FRPP).
Another option is to look in our classifieds section, one of our users might be selling a set of aluminum heads.
One last thing, heads have 2 "flavors", Pedestal and Stud, this is how the roller rockers mount into the heads. Stock heads are "pedestal" mount. So if he is gonna reuse his rockers he needs to buy a pedestal type head. Else he will need to buy STUD mount (adjustable) roller rockers.
Also Explorers had a variation called the GT40P, these can be found in 1996 to 1998 5.0 Explorers, these heads require special headers which are sold by MAC and Ford Racing Performance Products (FRPP).
Another option is to look in our classifieds section, one of our users might be selling a set of aluminum heads.
One last thing, heads have 2 "flavors", Pedestal and Stud, this is how the roller rockers mount into the heads. Stock heads are "pedestal" mount. So if he is gonna reuse his rockers he needs to buy a pedestal type head. Else he will need to buy STUD mount (adjustable) roller rockers.