Thanks for last two replies today.
I just turned the mixture screws in all the way one at a time from 1 1/2 turns and it decreased RPM from 850 to 550 but did not stall engine.
I can't check timing right now because when I installed a new water pump I also installed a new harmonic balancer and adjustable timing pointer. So I need to find TDC again to get the pointer right and will then check timing again.
https://www.summitracing.com/parts/SUM-164700 (timing pointer)
One thing of note is my vacuum advance is connected to port (passenger) vacuum on my Edelbrock 750 carb.
Thanks again!