i want to replace a rotor on my obd0 vtec distributor..cuz the screw on the old rotor came off...but something new came to my attention.. on the obd0 vtec distributor there are 2 hole slot for the rotor screw..man.. hella weird..which one is the correct hole... they are 180 degrees from each other.. im not getting good rev.. someone pleeaase help????