Gt40-P Heads

Has anyone used the gt40-p heads from tristatecylinderhead.com? At $598.00 for the pair it's looks to be a pretty good deal for them. They have 60cc chambers, stainless one piece swirl polished under-cut valves 1.94 intake 1.54 exhaust, 5 angle valve job, good to .550 lift, spring pressures are 129psi @ 1.800''/ 280psi @ 1.300''.
We plan on running a tfs stage1 cam with them, tfs recommends 110psi closed and 257psi opened, thats whats in there recommended kit, the extra psi wont hurt will it, I don't se how since it's only 19 to 23psi more.

Thanks, that is what I was hoping someone would say, I am going to strip them down and do a little port&polish work to them before we install them though.