I Decided to build my own circuit and test GM Twin Post Coil Packs and share the results as there was no testing or results around on the internet, also to debunk coil myths with MSD and L67 Coil packs having more voltage potential.
My circuit was built using a IRF740 N Mosfet a diode and 2 resistors, driven by a Frequency Generator and bench power supply. The LSX Coils were used with another box to drive them. Links included below for the coils purchased new.
Wikipedia link for free air voltage vs spark jump distance https://en.wikipedia.org/wiki/Spark_gap
Discussion thread here to https://pcmhacking.net/forums/viewtopic.php?f=31&t=5136