Hate to say it, but their heads ain't that great, out of the box, either. I'm sure you know that though. You could spend a day on OOTB Eddy's and they'd kill the TF's
For the ridiculous price, they should be waaaaay better!
The TrickFlow head is a great head for the guys that want to bolt a head on right out of the box. I wouldn’t do it but many do and it’s probably one of the safer heads to do so if you are a “dice roller. They are also great for a guy satisfied with running 10.50’s-11.50’s and just picking up a phone and doing so. But yes a Speedmaster, ProMax, or Edelbrock head can be made to go a lot faster. I keep hearing rumors of another racier head by a well know head producer but I’ll be tight lipped on that for now.