First post. Was considering building a stroked 340 and was considering the Promaxx heads CNC'd with 2.08" valves. Was wondering if anyone has any experience with the valves that come with them. Was wondering if they are a quality valve. I think they are Ferrea valves. Not sure if they were imported for them or if they are indeed Ferrea valves. Hope I am spelling that right. Any info would be appriciated. Thanks.