no need to set it to anything, leave it at 0 degrees and point it down the hole on top of the gearbox, you need the remove the green plug and you'll see this:

The small punch mark is the TDC timing mark, and the big red arrouw is the BTDC ignition timing mark. Set the dizzy so that the big mark lines up with the arrow on the gearbox housing, paint the marks with tippex to make em easier to see
