Please could you confirm for me the ignition timing information on my 2.0 litre pinto engine. The Haynes Manual states 8 Degrees BTDC auto data states 10 Degrees BTDC. The timing mark is more than visable on the left hand top of the crank pulley (and I have marked with tippex) on the front pulley is a mass of grooves and lines with conflicting info in both Autodata and Haynes, Am I right in thinking. The engine rotates clockwise, there fore the final line on the pulley is TDC and the ones before are degrees BTDC?
The car runs well and I am well aware that 2 degrees is not going to make a massive difference but however would like it right.
Also is it vac on or off when setting the ignition timing.

vac off and it depends what on the year and vehicle it was out of

plus what cam and carbs are you running now

10% -12%
the best way is to use a strobe light
and remove the vacuum pipe

Ok so vac pipe blanked off and disconnected, 10-12 degrees BTDC and I have a digital strode light so I can dial in 10 Degrees BTDC and which line am I using on the bottom pulley then?
The engine is a standard 205 block and cam. D gas carb and 4 into 2 into 1 exhaust.

12 Deg to give full power carb set to 2% co2

The big line is TDC then its 2% /4% /6% etc if i remember right

Try this link Duncan, should be useful.
http://community.rhocar.org/index.php?showtopic=22110
If you are using a strobe you can dial in the advance with just set the strobe at 10° and you are looking to line up the TDC mark, the big one with the timing mark. The lamp has sorted out the advance for you.