I was just reading an article on the setback blower , and about how before the setback blower they would run different rod lengths on the front cylinders and the middle and back . And how they did it to even out compression and allow them to run fuel nozzles of equal sizes . Now this is a silly question but do you have to run different sized rods in a blown carburatered engine? Oh and does anyone have any pics or info on larry meyers shoe device that he invented ?