Fuel pump W-30
#4
The limiting factor for fuel pressure when using a Quadrajet is the area of the needle and seat. Too much pressure will blow the needle off the seat and flood the carb. I believe (but am not certain) that the W-30s used the same needle and seat as other Quadrajets of the same year. So they could not run any higher fuel pressure. If in fact the W-30s used a larger needle and seat (a common performance improvement), they might technically need a lower fuel pressure (though I think there's enough margin with stock pumps that you don't have to worry about it).
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