Only $200 difference to go from the 680 HP version to the 700 HP version and with that you get TFS 240 heads over ported 440 Source heads. That's a no brainer upgrade.
The question is...are you man enough to run the PxQ rockers?
The TF 240's are $1093 and ported Steaths are $999/head. We replaced the valves, guides and one seat on the Stealths in my 511". I have more confidence in the TF heads based on AndyF's feedback that I do with my own experience with the stealth heads.
Maybe I have bad luck...idk. The current cam is .650ish lift and only runs 220lb seat and 570 over the nose with a 6100rpm peak hp.
