stuff in my fuel line

[67Fleet]

Truck is detonating a little under load. Runs fine at idle and I'm not noticing any power issues. I told a guy in my club and he looked under the hood while the engine was idling. I have one of those glass fuel filters by the carb and he noticed that the fuel wasn't completely engulging the filter (there is a long bubble of air that runs the length of the glass) and said my fuel filter is likely clogged and the carb isnt' getting enough gas. So I just put a new one in. There was a bunch (not a ton) of little tiny black rubber shavings. Like after you shave your face after a long weekend....I replaced the filter and started it up. Then I see more of them in the brand new filter. Is it time to replace my fuel line from the tank forward? Or is this stuff coming from somewhere else? I figure it is coming from a worn out line somewhere so if I might as well replace all the fuel line. But could this stuff be coming from somewhere else?