I've had a 6AL on my 32 roadster for over ten years.
No problems.
Runs with a Mallory Unilite distributor.

Make darned sure you have a good ground with both these units.
That seems to be where problems start and failure - sometimes - isn't far behind.

I chose the 6AL due to it's capability of having different RPM maximums.
Change a chip does it.

Kinda nice to throw in the 3000 rpm chip when the kid drove the car....