Sometimes theory and math don't prove out in the real world. Based on what 1project2many explained about the time between pulses being how RPM is calculated (I didn't know that), it might not work...

So, for the odd-fire HEI, they must have used a V8 sized distributor, but with a more specialized reluctor and distributor cap. What were the results when someone tried to use a 7 or 8 pin module...

I'd have to agree with Six_Shooter on this. I don't see why an odd-fire HEI distributor (which I understand is based on a V8 HEI with two dummy posts and a 6 point reluctor) couldn't be used along...