It's a 750 CFM around 80s and 90s what I read was it wasn't a quick tune. I have one I bought off a guy that had it on a Ford truck. Bad thing is I found a kit on eBay around 47 but all I need is a power valve gasket for the cover.. it leaks bad. But no auto parts people know what I'm talking about.. not a popular carb !!Does anyone have any info on a holley carb with the following numbers stamped on the choke horn, R84013-1 2812? I can't seem to find anything on this particular carb. Any info would be greatly appreciated!!!