The upgrade to EFI begins by cranking the engine to top dead center (TDC) on the number one cylinder, and then disconnecting the battery so that the motor can't be accidentally cranked over later. Next, the battery and the distributor are removed. When removing the distributor, note the position of the rotor. This is required so that you can index the new distributor correctly. If you don't get it in right, the motor will run poorly or not at all.