If you should shop for a Weber... please make certain you shop for a Redline Weber. Not the new and unimproved POS "weber" That would be any of the DGEC series. They are trouble. I would recommend the DGEV,DGV or DGAV 32/36. Old school, proven and a real upgrade.
That so called "weber" DGEC 34/34 will fill the crankcase with fuel. Forums are littered with the issues that unsuspecting buyers are faced with.
But in a more direct answer to your question, Yes you could mount up the Holley...another very fine carb. I would suggest the 350 cfm although i have mounted the list #4112 two bbl. w/500 cfm but with jet modification, sweet.
BTW the Carter BBD is a fine carb if keep clean and a kit installed each year. A simple task in itself. Got to keep the idle tubes clean though. If you were to decide to try a kit and a reaming of the idle tubes to .032 then that will make it enjoyable in itself and spend very little money at that.