What else do i have to put in my mustang to install a cam?
I bet your valve springs are shot and the valve faces and seats could use a touch up along with new valve stem oil seals, might as well have the guides looked at too while you are there. I would replace the springs if that is a high lift cam, shimming them could cause the springs to bind. if u don't replace the timing chain and gears, your new cam will run retarded and not work as well, and if u don't install new lifters, the new cam will fail in short order
how many miles are on that 'stang? if it is over 100K better think again what's going to happen to those piston rings with this mod?