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Stock, about 3, to 3.5. High performance, 6 lbs., is about all the needle, and seat will take.

NEW ANSWER : That is a fuel injected engine / TBI fuel system and it requires 9 to 13 LBS. of fuel pressure to even start and run. It CAN'T be any LOWER are HIGHER are you will have problems.

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13y ago
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Q: How much fuel pressure should a 1988 Chevy pickup with a 350 small block have?
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