Installing a 42-48 crab dizzy

As I calculate it, you now have about 4 amps going through the points, which is about right (12/3=4). If you put a Bosch "Blue" coil (with 1.5 ohms), you will have will have about 8 amps going through the points (12/1.5=8), which is going to be a problem with point wear (if nothing else).
 
Make sure the plugs are gapped at .025". Going wider increases the load on the HT side of the ignition, which can cause problems.
Mart.
 
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