Holley Rebuild Kit

Most factory applications had no in line filter if the carburetor had one.....or two. Every single GM product I have ever seen with a factory quadrajet where the system was untouched did not come with an in line filter, so most any in line filter is an upgrade. WIX, Fram, AC Delco....and good brand name metal in line filter will be fine. Since only a few manufacturers make the filters themselves, you likely already have a good one. Those compressed brass filters are pretty restrictive anyway.