For budget build carb swaps with a relatively stock engine and mechanical fuel pump, I typically would splice in a filter where the line runs up the front of the engine. This isn't my picture, but something like this. Napa used to have a metal filter with 3/8" barbs and a paper element that was reasonable that I used, but can't remember the number - did a quick search and couldn't find it. The one in the picture below appears to be either a plastic Fram G3 or Wix 33003, which would probably be OK, I'm just not a fan of the plastic and especially not the glass filters.
If you want something quick, easy, effective, and cheap (until you could do something "better"), you could use the Fram G3 filter and splice it into the rubber line going to your carb - splice closer to the hard line. I wouldn't want that to be my permanent solution, but it'll do what it's supposed to do.