What is the horse power on a 1967 327 with a 4 barrel carb?

i have a 1967 caprice with a 327 and a 4 barrel carb and i was wondering what the specs and HP may be. the thing is i don't know if it was originally a 4 barrel carb and i cant tell cause we bought it with an aftermarket Edelbrock carb on it. the only thing i can do is check the serial number on it. i don't know if it would make a difference being an aftermarket 4 barrel anyways. i want to buy an air cleaner 327 sticker i just don't know what one i need. or how much horse the 4 barrel 327's were. like i said i need to check the serial number to see if it was originally 4 or 2. also im scared there were more than one 327 with 4 barrel back in the day and they were different. help please :( i just want to know what i have and what sticker to buy. :(