carburetors 360 , 273

do you have A j.c. whitney catolog ???? they used to sell adapters,,
also try looking at jegs.com or summitracing .com type in carb adapter in the search box,, your locl speed shop should have a trans dapt catolog,,,they make things like that,,,do A google search on carb adapters or search transdapt,,,they are out there,,what year 273 ??if it is a 1966 or newer 273 you can use a 318 or 360 intake,,and wont need an adapter,,im sure some one on this site has a 318 2 bbl intake laying around,,,if the 273 is a 1964 or 65 the intakes wont interchange,,good luck