http://www.edelbrock.com/automotive/mc/carburetors/pdf/carb_owners_manual.pdf

Page 5 gives fuel pressure specs, says to set it at 5.5 psi at idle.

Being a dual quad setup you probably will need more volume but not more pressure than a single setup.

I've also seen the brass float get pinhole leaks over time and start sinking. Make sure your needle and seats are not leaking by.


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They say there is always the exception that proves the rule.
Don't be the exception.