Intake swap, poss gains?

1980volare said

Have 5psi fp at wot.

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Not near enough! Add 2 psi.

Jetting up that much is another indication of insufficient fuel delivery. Plus, it slowed down so it may be way too fat if it actually is getting enough fuel.

I'd go back to the factory baseline, maybe +2 jets on each end if you have a spacer, up fuel pressure if you can and see where it falls.