Thanks. Thats interesting. Did not have any evidence that converters would/could add load or not in the very low rpm range.
I wonder if the car companies changed converters when they increased idle rpms late 60s early 70s.
I've certainly recall some cars would want to creep at fast idle in drive.
I think I may try hooking the vacuum advance on my boys car to manifold. See how it reacts to much more timing when going into gear. Quick easy check. And check for any vacuum leaks while messing around.