Slant Six stalling when foot on brake & engine warm - transmission issue?

[slantsixdan]

If it's really tuned to those old specs, that may be your problem.

No.

Needs more initial timing for starters. Spec is what, 5 degrees BTDC? I'd put it 12 degrees

No. Stock setting is 2.5° BTDC. Optimal setting is around 5° BTDC. 12 is way too much.

And this problem is still not being caused by the car's ignition system.