1965 Valiant Signet 273 2bbl

That's not the #...sounds like you got that off the bowl casting. There should be a tag attached to one of the bowl cover screws. If not, it's a Carter BBD 2bbl. Kits are available..they cover multiple years. Try eBay
1960 74 CARB KIT CARTER BBD 2 BARREL MOPAR 213 255 313 318 DODGE ENGINE - NEW!