Just my .02 cents worth, I went the most certain more expensive way, called up Summit Racing (while mad at the factory starter...) and ordered up a Powermaster XS torque.... No problems turning over the ol 440 then.... It is rated up to something like 18:1 motors, yeah I know over kill, but hey, when it turned that 440 over, before the motor fired up, it looked like it was running already, lol.