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Old 10-02-2022, 03:11 PM   #5
truckster
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Join Date: Jan 2001
Location: Orem, Utah
Posts: 7,805
Re: L31 crate engine on regular gas?

I run a rebuilt L31 with approximately 9.7:1 compression, a little hotter cam, Quadrajet, and HEI. I've had no problem running 87 octane.
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