I've got two Holley 4150 hp gas carbs (750 CFM / 4 barrels / Square bore carb flange / Mechanical secondary)... Summit Part number 0-80528-1... Both carbs were rebuilt prior to the 2014 season. I'll ship them but on your dime. I'm asking $400 each. I don't get on 4m very often anymore so please contact me at Lt.Stryker@gmail.com and put carbs in the subject line. Thanks.