Small block combo suggestions

You need to look into carb tuning see were that is. Rumble got the right idea here if you don't change any thing else a more agressive cam will help. Please do not believe the advance curve is to fast. When you changed the timing from 35 to 30 you changed initial to 10. reduce the amount of advance in the dist and bring your initial back to 15 or higher especially if you go with more duration and over lap on the cam. All smart engine guys never use slow advance they go with even faster. My engines start at 15 initial as soon as it fires it goes straight to my total. The only time you slow the advance is if you can't get it in fast enough and hold it high and you put your automatic in drive, that drops idle speed just enough for the timing to drop and effectively stalling the engine.if you have any other reason for slowing your advance you have big tuning issues to deal with.slowing advance is the same mentality as you cant put 3 inch exhaust on cause you need back pressure for the street. And that is wrong.