FBO's black HEI ignition box

RB,
I don't think we can can get baby steps small enough for you......

The 20 mag produces 0.3 amp [ 300 mAmp ] of secondary [ spark plug ] current, & the 44 mag produces 1.2 amp. Both less than battery & coil ign as shown in earlier posts. Maybe that explains why very few people use mags.....
To produce these spark outputs, the 20 mag generates 20 amps & the 44 mag generates 44 amps in the primary coil. You do understand the difference between pri & sec??