tacho conversion to suit electronic ignition

I need to convert my tacho to suit electronic ignition .I'm just wondering what people modify these days . I'm using lumenation if that matters.
Cheers in advance

Hi
Not sure if it's relevant but have a look at the link below
http://www.ozclubbies.com.au/index.php?/topic/3953-zetec-tacho-problem/
Does this help?

G'Day,
I used to run a Lumenition Optical setup on my 2lt. The pickup from coil still ran Tacho fine on an RS dash.
 
Rhys

Hotboost,
2lt_Scort would be correct in his comment on the lumenition coil connection, with that system you would use the standard type coil and connections, as your taco signal is taken from the  negative side of your coil it should just work for you. I on the other hand  can not do this because my MSD setup switch's the coil independent of the 12v ignition circuit, hence I needed to place the taco adaptor in the original loom, the adaptor mimics the original coil negative signal and behaves like it  is hooked into a standard Capri ignition/coil setup. So my standard taco sees a current pulse and not a voltage pulse. The taco adaptor is triggered by the voltage pulse output from my MSD 6AL2 Programable ignition box.
 
Scott

Cheers Scott we are running motor on dyno Sat to check it all over. I hope we can get the lumenation running otherwise will have to run the crane setup