my dad bought a carb off a guy but he dont know what size it is. its a holley 4 bbl with vacuum secondays and has the numbers 1850-5, 0848, and gr 7809 b1. if any one could tell me what the carb is i would greatly appretiate it. or where i could find any info on it. thanks

boom

look it up.

http://www.holley.com/data/TechService/Technical/Carb%20Numerical%20Listing.pdf

thanks, its a 600 cfm, i figured it was but wasnt sure.