If your running a obd1 ecu don't put in a obd2 dizzy in there because it won't fire correctly. So your putting it in a 93 civic just keep the z6 dizzy only 1 bolt should hold it up i beleive since its not the same head as the dizzy and make sure you put it in correctly on the right side when you put it in the head. and even though you rewire the y8 dizzy to obd1 the internals still thinks its running as obd2.