the housing containing teh filter is leaking.
teh filter is a glass casing that you unscrew on one end and replace the little element.
Bro, if you want you can replace your glass filter with a new one, they sell them at advance auto, jegs ect. and are only like 8 bucks or so.
you probibly already know to change the filter by the tank regularly anyway because it see's all teh crap in the fuel first.
holley recommends you have a filter by teh carb, but to your question, will any filter fit? It should as long as it was made for your fuel delivery needs, one ment for a v-8 pickup should work, but one for a chevette would probibly be restrictive.