Just my $0.02, I run ICE ignition on both Pantera and the Longchamp. Troublefree so far, and you can change the ignition curve and max rpm (2 steps) from your seat. The Pantera system is pretty race-like stuff, the Longchamp has the daily drive system with a vacuum signal going to the box, not the distributor.
Only problem is I haven't found a source outside Australia that stocks parts for it, so when I e.g. need a longer box-to-distributor wire, it takes weeks.
I've never heard of anyone else using ICE, if you're out there, step forward...
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