I have run up to 3 filters on a stock pump for the same reasons
just did not replace anything
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rusty tank and fuel line
2 filters before the pump and one after the pump worked fine,till I got more rust holes in the line
then it would blow air bubbles in the filter after the pump and had supply trouble
I added a little cheap in line banger pump to help keep fuel to the stock pump and it worked fine for a while
I changed the line and removed the extra pump,left the 3 filters
ran fine with it like that for a long time
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