I put an 800 cfm elec choke Edlebrock performer on my mildly moded 430 Riv and love it. Worked good out of the box, better after needle meter change and quicker pop springs, then I screwed it up a little by going full jet bigger on mains. but its never flooded, caught fire, or hot locked. I get aprox 15 mpg with 3.42 gears, 268 comp hyd. cam, A/C on at 70mph touring. I've got a 200-4R OD trans, which helps.