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I disagree. He probably has an honest 290 flywheel hp. I would not really expect more than 320, maybe 330 out of it.



That's 360 w/stock heads and xe256-268 hyd territory.

That engine should be making an honest high 3's easily. RHS headed 360's with 9.5:1 and xe275hl will make 420's+.

The tune up, fuel delivery, something is way off, IMO. 3600# only makes it look worse.