There is no preset #1, but because of the way you have to plug the dizzy up, you have to point those plugs almost towards the drivers side fender. Then when you sett the timing you have room to move it back and forth.
Here is my 87 HEI, dizzy. The cleaner wire is #1, and you can see where the dizzy is pointed. If you mark the base of your dizzy near where that #1 is, and then put the dizzy back in lining up the rotor to the #1 you have marked you will be fine. if it is off jut a smidgen you can move the dizzy to line up the mark with the rotor tip.
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