You might as well rebuild the primary side, since you have the kit and carb sitting there on your dining room table....
If you haven't cleaned off your metering block in a few years you might be surprised at what the ethanol in the fuel does to the Holley coating. I've written a zillion posts on clogged air bleeds and here's a perfect shot of the crap that's in there that clogs them up. Yes, Ellie's butt in the background there is cleaner than that metering block.
Just use carb cleaner, a toothbrush, and compressed air and it'll be almost as good as new. If it is horrifically bad, just buy a new metering block.
