360 stalls on deceleration from throttle blip

Wow! That was way over my head I’m not gonna lie. Thanks for all the info. I’m learning a lot. So running on the ported side for my vacuum took care of my stalling after hitting throttle hard and letting it off quickly it doesn’t die. I was able to set timing to 10* and idles well at about 800-850. I’m wondering what the normal rpm fluctuation is at that idle. Mine jumps around 30. Is that ok?