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My 2022 Lt1 made a simple 707/669 on E65 with Maggie 2300 (used), Toohighpsi port injection with stock Lt1 fuel system except for a JMS boost pump. Had totally stock Lt1, stock exhaust front to rear, stock A10 that was unlocked. We made just on just 11 psi of boost. Believe me 707 will make plenty of power to get you in the high 9s with a drag pack and good tuning. Mine ran a best of 9.80@142.96 and was a great daily driver. You can push past that 750 rwhp number but your chances of breaking pistons as I did on my 16 SS at 770 rwhp. That was no fun building a forged motor because I just couldn't stop pushing it. I did survive over 180 passes down that track and many of those over 15 psi of boost. So keep it safe and you'll have a great street car that you can take to the track and beat on it safely.
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