Ive just aquired 1.7 scorpions to tack onto my TFStreet heads. But, in trying to sell the 1.6's that came with the kit.. I was warned that due to the geometry of the heads - ONLY TF Rockers will work on them.
Did you get the Trick Flow Packet that came with the heads? When i got my TFTW's an info packet came with them that told everything from how to torque the heads to, rocker arms, to spark plugs. I believe there is 5 different brands you can use. I think it is trick flow, FMS, scorpions, and 2 others i can't think of.