Livernois has a fairly good reputation. I have seen TEA's work, and it is second to none. Also BBR has been stepping up with the 3v heads for a while now, and I havn't heard anything bad about them. I would shy away from MMR, I've heard of too many issues with not only their heads, but everything they build. (lack of quality control)........Get with Richard with RADmustangs, he can get you some good deals!!