This is a fresh built 743240 455 quadrajet 800cfm. Stock specs. 73 Jets N Hanger CE rods New: throttle shaft bushings front choke pull off float needle/seat gaskets Fuel Filter I always disassemble the carbs I build, and soak, then clean and put back together, checking all of the specifications. I have been building Quadrajets for 30+ years, and still study them to learn more. Cliff's book and information are applied here, and I buy most all of the components from either Cliff or Greg. Sprayed with Eastwood Carb re-new. $215 shipped in US with you sending me your old Qjet for a core $265 shipped in US without a core. I guarantee my carbs. I can also build 2 jets, and the 4gc's if you need it.