The fuel filter can vary considerably from a small in-line unit to a large canister unit. I have a mechanical fuel pump and my fuel filter sits on the fender and is quite large. I have sen some sitting right before the carb. You might have to look around a little to see what you have.
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
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...and your Holley may very well have Moraine filters in the fuel inlets (mine does). If you didn't know to look for them, you might not even know about them. They look like little brass meshy things with a spring in them. You need to clean them every so often too. Here's a pic: