much more accurate to remove the plugs & just rotate the engine by hand. when adjusting the rockers the cam needs to be in a specific position doing the E/O I/C or the crank in a certain position doing the multiple valves at a time procedure some use on smaller cams. using a remoter starter switch wont be accurate but will help get it close if you dont want to use a breaker bar or long ratchet to do it by hand.
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