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fuel pump for v6 will not supply enough fuel for a v8. they are calibrated to supply different amounts of fuel at different pressure

It depends on the year and fuel system. I know better. I have been with Gm for 22 years. I have a v6 4.3 fuel pump out of a 90 s15 in my 89 silverado with the 5.7 350 v8 and its just fine, look it up, its the same part number. it even fits a 7.4 chevy and a 5.0 and a 2.5

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โˆ™ 2013-07-28 07:13:40
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Q: Can you put a fuel pump for a 4.3 v6 in 5.7 v8?
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