ANOTHER 292 L6 with 600 edlbrock running issues. QUESTION

[mattbert56]

been a while since I've post on here but my old girl has finally thrown me a small issue that I am stumped on, and I'm reaching out for assistance. I gone threw the entire fuel system and it's fine new filter. Clean tank. New lines. New pump. Fresh rebuilthe 600 edlbrock manual choke. Just took the top off last let night and wasted 2 cans of carb cleaner on it. Maybe 4k miles on new Ac Delco plugs. Fresh coil on hei dizy. Valves sealed and adjusted. Cam in good shape. Everything engine wise is sound. Timing is around 6 to 8 degrees advanced. But what's she's doing now is after running round the block common up to stops she drops idle down to around 200. Just barley running and contnuind to drop untill dead,maybe starVing for air?. A week ago she was running like a top. No issues at all. Then all of a sudden she starts tripping up. Before this she would hesitate during shifts HARD and usually kill the engine and wouldn't start for few seconds. I thought maybe the accelerator pump on the carb. (I belive that's what it's called) took it apart clened out. Problem solved. Not the low idle. I should mentioned that after warming up it'll idle right around 500 or so where it should be but it almost feels like it gets "trapped " in a low idle unless I tap the gas. Any helps apreciated. I found tons of motor geeks on here that are very helpfull.