TR6 Idle Issues After Long Winter Storage – Advice Needed!

Hey everyone,
Pulled my 1974 TR6 out of winter storage last weekend and it’s running rough at idle—almost like it’s misfiring or running on 5 cylinders. Once I rev it past 2k RPM, it smooths out a bit. I added fresh fuel and checked plugs—they looked okay. Could it be gummed up carbs? Any tips on a spring revival checklist for these cars? Appreciate any thoughts.