Mine did 245 and 258tq running very rich at 8 psi. Keyser then bumped the timing up and leaned it out. I put it hotter plugs at it felt like a different car...then I ran it ocasionally at 10psi...so I think about 265 is a pretty conservative estimate to what mine did before I tore the motor out. Although I think it was still a bit rich...horse van vouch for that...his eyes were burning while driving behind me.
We'll see what happens when I finish this time!!!
