When to upgrade the stock fuel system?

Cobra4075

Founding Member
Feb 18, 2002
286
1
17
Tinley Park, IL
My motor is mostly stock except for exhaust and pullies. I was thinking of using the stock gt40 heads and cam from my cobra. This is my daily driver and I would like to keep the fuel economy decent. Basically I want to max out the stock injectors and pump. How far can I or have you gone on the stock fuel system?
 
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