Trigger weel diameter

[Twentyover]

Hiya guys. Think my question would be best put in the ignition section, since it actually has something to do with ignition.

A bit of background- A compadre and I are putting together a couple Ford 2.9l Cologne V6 engines for what once was SCCA GT-2 racing. We are both running variants of carbs- Me, a Holley on a modified Offenhauser dual port initially designed for a 2.6 Ford, he’s running a trio of IDA’s. We’ve both been working on how to fire the ignition, and I think I’ve settled on a crank trigger running a MegaJolt Light using parts from a Ford EDIS system. It seems to be much more economic than the Electromotive system, and still looks like it can provide good ignition.

I’m currently collecting parts for the build (I’ve got forged pistons, ported World Heads w/ big springs and titanium spring retainers, cam, ATI balancer and am working on an aluminum flywheel.

Question is on tone trigger wheel diameter. I’ll be running a small diameter BBC crank pulley bolted o the balancer, and I’d like to put the triggerwheel between the pulley and the balancer. The outer ring of the balancer is 6.325” diameter, I plan on running a small diameter crank pulley (smaller than the balancer.)

Now my question. How much abouve the height of the balancer ring do the teeth need to project to get a good signal to the crank angle sensor? 1/8”? ¼”? a foot?. I’ve been trying to find an answer on this and I’m pretty much drawing a blank. The only car I have with a crank trigger is an old explorer and it’s not much help.

Thanks in advance for your help