As a guy who drives a cammed Gen 2. It's fun, hearing the sound of 8500+ RPMs, is addicting. Youll only gain maybe 10-20hp, but the sound is worth the price imo. I'd recommend boost if you're looking for speed. Id Cams are for if you're looking for a fun street car that doesn't feel like you...
At the bottom of their page they let you know what needs to be done to fit mustang cams into an f150s. You get to skip the hard step of repinning...unless you plan on using an f150 harness.