Vacuum Advance sticking?

Thanks you guys for the input!!These carbs are 3 x 2 Holley 2300`s. After going over all the vacuum line plumbing to see that everything was in the correct port and checking for leaks, I took to the timing light.I had about 3* BTDC base timing, the car likes more,the book says TDC, but the compression is near 11-1 and with octane boost and premium gas the engine will ping if I advance it too much. I went ahead and bumped the timing to 10 before and backed off the idle.The engine would rev and come right back down to idle. I think Moper nailed it with the vacuum passage being uncovered at the throttle plates.Weird thing is this is basically a stock 440-6 car with a stage one port on the heads,284/484 cam and dome pistons. Why does the timing have to be so far advanced to get everything in sync?Factory spec was TDC.Oh, and now when I put the breather back on the engine ,speed increases about 200 rpm. Is that richenening the fuel mixture now that I`ve advanced the timing so far BTDC.Spark knock may become an issue as well,I don`t want to buy my fuel from the airport.