What? 1949 Chevys don't have mass air flow sensors? LOL. You have jolted out another childhood memory. This time it's of my parents turning a corner in 2nd gear (3 on the tree) and the engine "groaning" a little bit because the car was just a little too slow for that gear. Going to first was not an option because of a no syncro in first. Now I can understand what would happen if this was tried in a loaded dump truck. Jay 6155