Issue just got bigger.
I was just starting work, I checked resistance of the leads through the cap, the king lead on the old cap has 15,000Ω as the new one only has 5,000Ω. But two things to point out, the "old" king lead is a new generic one I put on to get the car running again while I waited for the new stuff. And the plug leads have less resistance on the old setup. 5,000Ω vs 6,000-10,000Ω depending on length on the new ones.
Then I fitted the old cap on to check the timing with a timing light. Start attempt one, cranking a few seconds then starter spins disengaged. Try two, cranking then a "tonk"
noise heard. Third try, ignition light dims but nothing moves...
I checked if power reached it, and it does.
Removed the starter bolts, it won't bulge out. The workshop manual says clearly "The starter can be withdrawn without difficulty.
". It does not. It is, according to that chapter, "an indication is given that current is flowing through the starter windings but the starter is meshed permanently with the geared ring on the flywheel.
" So I tried to turn the engine with the crank handle and by rocking the car while in gear to dislodge it. The engine is not turning even by a hair.