Im getting the Hotrods installed next weekend, i love the sound and its designed by Ford and tested in the truck racing series. I would attempt the install myself but it requirs a timing lock tool that costs $300 bux but the install is only $500, so its just not worth it. Ford manual says 4 hours but most shops will charge 6 because of the removal of everything else around the cams. Also getting the car tuned by Dan @ Realspeed.
I think the Comps will give you a lil more power but ive heard that you MUST get phase limiters with them. Neither cam requirs a tune but you wont get any more power out of them without a re-tune, youll just get the sound.
My budy just installed Comp SPR Stage 2, it was 12 hours of labor!! and it does not sound as good as the FRPP hotrods but the SPR cams netted him 348RWHP on a Mustand Dyno, thats about 380ish RWHP on a Dynojet, those are great number with stock headers and long tubes / ORH / CAI.
I will let you guys know what numbers i get outa the Hotrods soon, i have CAI / Delete plates/ stock exhuast manifolds n cats.