67 twin turbo dart

Any chance the air gap is too wide or too tight on the crankshaft sensor, causing the signal to drop out?

Loving the build. Keep up the good work.
The gap is set to 1mm which is the gap megasquirt said to set it too, and the adjust nuts are lock washered, checked the brackets that's still tight. Its odd it was revving clean before and just starting doing that.