So my dad is going back to using an Autolite 4100 on his Hertz Shelby automatic. Right now he has a Demon carb on there with a Paxton supercharger. I am providing him with a regular Autolite 4100 that a guy in Cali is going to rebuild into a hi-po carb. . I assume he is supposed to have a manual choke on the carb, is that correct?