Sound the alarm, maybe...

I have seen bad reviews, and good, for the speedmaster heads. The worst review was by someone trying to sell his ported iron head motors. Self interest maybe?
I have not taken mine apart yet, so i cant speak to mine (gonna change to conical springs for a solid flat tappet) but my old racing buddy has a pair on his turbo LS stroker motor. They must be garbage, his stroker is only making 1200hp.