No spark

Mag pickup in the dist...everyone ALWAYS overlooks it, and assumes its the coil.....if you're contemplating any other type of perf upgrades in the future, I'd go with a digital summit box and throw the factory ballast/box in the trash...but thats just my opinion after a string of bad luck with the factory ignition setup,..but back to original question...the magnetic pickup in the dist would be my guess since u seem to think the box,coil, and everything else is good. probably $16 at auto zone. good luck!