SOLVED! 318 2500-3000 rpm idling issue. Don't think its a regular vacuum leak. Swapped 2 intakes, 2 carbs ,and 6 different gaskets still no luck.

Been messing with it more today, pinned the fast idle and got the carburetor completely closed. It's set to 12* initial, Totally eliminated the vacuum advance and I think I got the weights to kick off and now I'm able to get it down to 1600 but that's as low as it goes the throttle is closed all the way and runs rich as hell. I can get it closer to 1100-1000 rpm if I bring it to zero degrees or retarded but it makes no vacuum and wants to die and backfires if you hit the throttle.

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What is the camshaft duration at .050 and what's the compression.

If the engine is "oem" and you having trouble with vacuum, sum-ting-wong.

If you have oem pistons and you slid a budget cam in there and the ICL is late... your crutching the combination with timing to keep'r running.

Re-ring with considerable taper?