Assuming that you're checking for spark at plug or coil... didn't say much other than "changed all electricals"
Don't want to preach -- seem to be "know it all"... sure you're been working at it for awhile.... but:
should be pretty simple... good condenser, points, coil...gapped right, see them open/close, have power...should get a spark, or at least see points working.... start with making sure you have power to coil and low tension lead to distributor... use a test light: light off/on when points open close..
Make sure distributor/points plate, is grounded.
If you static timed it to start, should be able to hear/see snap/spark at points when they break...if not, probably not getting power there... try a test lead direct from battery to coil...?
make sure that you have terminals on right side of insulators at points... (pivot point on points spring) I've put them of wrong side before, grounding them all the time.....just took forever see that.
Make sure points have continuity.....recently, had a new set of Lucas points on a Healey, that didn't...open between arm and contact area...
Make sure rotor is good, cap is making contact.. pull coil wire from cap, take cap/rotor/wires out of loop to check coil wire to ground, while cranking...
Not seen a 6V Pertroinx.,..perhaps out there, but most electronic ignitions I've run across in past needed 8V, or more to fire...would think 6V system would have to be something special..
Check that low tension side well...make sure it's got power and is triggering...make sure you have static timing close...then go after the condenser, rotor, cap, wires, or plugs... look for "fire"...
Of course if it ran before, put all the old stuff back on...and try, again......
Must be something simple...get methodical....hope..... tommorrow, do church,.... seek Higher guidance?
Bob L.