Went to the salvage yard today and found two Qjets that might be a good rebuildable carb but don't know whick would be the better option. One I found on a GMC 6000 whick looked to have a BBC, the truck was a 74-75 model but I couldn't see well enough to get the numbers off the carb. The second was on a 78 big10 with the carb numbers 17084226 and next to that number was 1914 HCD. From what I can find online the big10 carb is an 85 model but what CFM would it be? It also had a electric choke where the one on the GMC6000 was a manual choke. Am I correct that like most aftermarket carbs you can add an electric choke to the carb as a bolt-on? At $75 which would most likely be the best to get?