OK, it seems low voltage to the coils should not be an issue. But I have been burnt a few times, assuming that new automatically means good. That is not always the case, either it is electrical or mechanical parts.
Disconnect both sides of your coils, measure between terminals. Should be around 4 ohms. From HT wire to ground should be 10 kOhms IIRC.
5 kOhm spark plug caps is OK, or 5kOhm plugs (resistor plugs) but not both!
Do verify the voltage at the coil + terminal, when the points for that side is closed, i.e the coil is drawing approx. 3 A current. The voltage should be very close to battery terminal voltage. A 10 second check.
Then, verify the current path from coil - terminal to ground. Disconnect capacitors. Connect the negative probe to engine ground (head cooling fin), and positive probe to coil - terminal. Ignition on, points closed. Ideally you should see zero volts, but up to 0,5 to 1 volt may be acceptable.
Then repeat this procedure on the other coil, with the other set of points closed.
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