My 69 Nova L 6 , 250ci engine ; YES , it came with a "Rochester Mono-Jet carb" = 1 bbl .

Look here (I just "searched Mono-jet carb" :

https://www.ebay.com/itm/1759917897...p;campaignid=20856436953&mkgroupid=1

I'm now using the Holley # 8007 , 4bbl , 390 cfm carb & OFFY intake . My car runs - - really good (using this set-up) ; still using my L 6 stock exhaust (here in Arizona) . . so,I still have stock "carb heat" .

jim