440 Source Head Opinions?

Well, ill throw my opinion in on the stealth heads. Take it for what its worth as I'm no expert.

I bought a pair, checked ABSOLUTELY nothing on them. Bolted them on, and every single time the car has run i beat it like a rental car. High gear burnouts, valve float a couple times (read above, rental car). Never had a single issue with them. Now the car went through some small upgrades and ill be forcing air through them soon and see how long they live. For the money, and not an all out race deal you can't really go wrong but like with all aftermarket stuff, have them checked by a competent machine shop if you can't do it yourself.