i have a 9 inch with 3.50 gears and i have a c-4 car came with 2.79 gears it has a 16 or 17 tooth gear so trting to decide what gear woul dwork better with my speedo.autokrafters has a 16,17,18,19,20 and 22 available .i also have 28 inch tall rear tires
19. I have a C-4, 9" 3.50 posi 28" tires and 19 is about prefect. 18 is just a hair fast at the speedometer.