318 msd 6al, msd blaster ss coil, msd distributor not working

I ran a separate battery to the starter with the key in the on position and it cranks but no spark. Doing an ohm test on the coil from the pillar to the negative side I’m only seeing 4.11 ohms and not the 4.7 it’s supposed to have, maybe shot the coil somehow??
Might try reverting the advance bushing and springs to what it came with to see if that’s an issue