Well, if someone has a head they wanted to compare, and was willing to supply it for testing, then that would just add to the information available. I have my own Pro Port heads here, also, as well as CNC'd Edelbrocks, Victor, Victor Dominator, RPM, Performer 390, Streetmaster, Street Dominator, PI, 8V MR, 8V LR, 8V TW, 8V BBM, 390 HP, P-O-S. I haven't invested in the Trick Flow as yet, simply because I don't really have a need for those or anyone asking for them. I would add a pair to my inventory with an intake for this kind of dyno comparison, though. I do think one source for all valve jobs and all port work would be the only way to compare FE to FE in a back to back type of documentation that was valid. Joe-JDC