I sent the original Q-jet from my 1970 455 to Hugger for him to rebuild to the specs of my motor (30 over, stock heads, ta290 94h cam, headers, 4 speed car). He rebuilt the carb along with setting it up specifically for my ride. The carb performed flawlessly from the box once I got it bolted on and fired the car up. In fact, I didn’t even have to change the idle mixture screws from where he set them after checking them with a vacuum gauge. The price was great too!