I have 2 Q-Jets. Both of them are 7042240's. 1972 800 CFM for non Stage 1 455's. These are good core carburetors. Both are missing the secondary pull offs. I have the primary choke pull off linkage for the one on the right. Carb #1 is dated- 1592 Carb #2 is dated- 0112 $50 each plus the ride.