Join Date: Feb 2003
Location: New Jersey USA
The marks being as wide as they are sure isn't exact...
For a street engine, a degree or two either way would be, IMO, extremely difficult for most drivers to even tell the difference. IOW, ballpark close is good enough. Using a degree wheel will get you in the right section while adjusting the lash of each valve so the valves are all timed the same puts you in the correct seat.
Series 2 USA 1750 GTV (in Series 1 European clothing)