just got me a '67 Barracuda

Nice car!

All most sounds like the dist cam drive is not in right and your tming is off. It has to be put in just right. If it is a few teeth off it will make timing impossible.

Good luck on your build.

I spent a good hour or so taking the distributor out, rotating the shaft one spline at a time in both directions, and re-installing it. There was only one position where the engine would run at all.