Cause of surging and loss of power?

[Geff McCarthy]

I asked for help with this problem; my 63 400 4bbl ran fine, but now periodically slows down, idles roughly, then recovers. I was advised to rrebuild the carb, which I have done for the 2nd time. I think my original hypothesis of blocked fuel inlet in the tank, or line, may be correct. When disassembling the Eddy, i found the filter screen at the inlet partly blocked by rubber-like debris. See photo.
So...should i remove and check the sending unit? Can I do this at home with a floor jack and stands?
Plus, the fuel gauge no longer works. However, the instruments were removed and reinstalled during a trans cable replacement. Confusing ,no?

 

[Bee1971]

Those needle and seat screens are part of either a Carter or Edelbrock carb - Bigger question is what are you using for an actual FUEL FILTER before your carb that all that crap is making it that far to your needle and seats ?

What type of rubber fuel hoses are you using also ? Brand of hoses