[daniel911T]

Very short history:
Car came with no CDI. Installed MSD 6AL in 2005. Drove it for a long time.

In 2016 the car sat for a year after a mechanical problem. When I restarted it, it drove great, then suddenly started backfiring, then died. I found an enormous scorch mark on the rotor and melted metal. Installed a spare, resistorless rotor I kept in the car, and it met the same fate within minutes. In a desperate bid to get it home, I wired around the MSD - connecting the Pertronix directly to the coil. It worked.

I got braver and tried to drive it more. It would start and run great, but as it warmed up it would start to misfire and lose power. That problem was solved by replacing the coil. That was as good as it ever got. I'm pretty sure the failed MSD damaged the coil.

Now I'm changing the engine, and I want to get the ignition sorted the first time.

I'm pretty sure my tach is a '69 original.

Jonny H ,
If I was using just the 123ignition and wiring straight to the coil, would my tach work?