I think everyone knows what people are reffering to when group a coil is mentioned, doesn't matter wether is it correct or not, so long as everybody wrong in the right way.
Makes a massive difference to smooth running and even gives better low down pull, although I now run a coilpack, and trigger wheel, single lobe dizzy centre etc, just got to experiemnt with plug gaps now.
My dad STOLE my group a coil as when I returned he had just finished fitting it to his 4i(v8), with new magnecor leads, world of difference on that, took away all the low speed shunting.
Trouble is he says he is entitled to it so more money I lose by not selling it!!
tabetha