I would say go with one of the 70s Qjets . The biggest problem is the choke set up . You may have to buy one of the auto store manual choke kits with the cable . And the linkage set up on the pontiac carb has a pin type . You may have to replace it with the ball type . Take the # off the side of your carb . Go to your local auto store and pick up a renew kit and a can of carb cleaner . I also am using a rebuilt 1970 Chevy Q Jet on one of my budget 350s .