[Big hammer]

Check into dirty leg filtering ! Remove the firewall valve ( save it ) 3/8 close nipple, 1/4 turn 3/8 brass ball valve and valve ( local hardware store) 3/8 close nipple, 3/8 to 1/2 bushing, 1/2 tee, 2 1/2 drop 1/2 nipple and a cap, bushings out to your fuel line. Close off the valve and fun the carburetor dry, remove the 1/2 cap and see if and how much rust you capture, then check it periodically. It will filter the rust you’ll never need to replace store bought filters ! When you have the original valve out hand twist a drill bit and clean out the trough ( bottom of the gas tank ) use a bore brush and clean out the remaining rust and crud . The only filter I have is the inlet screen filter in the Zenith carburetor ! All of the above fittings a purchased where brass that will not rust, cost me about 60 $