360 trouble. please help

Get the timing right for your combo.Prove theres no vacuum leaks.Install a set of cooler plugs.Tune the carb.
If youre unfamiliar with how the timing systems interplay, spend a little time punching the search button.
If youre unfamiliar with carbs, I recommend you disable the secondaries, so you can tune the front first.
If/when you have more questions,or if you are familiar with carbs and dizzys; please give us some details as to your engine,such as; C/R,cam sz,heads/springs,trans/reargears/TCstall,and exhaust.

At what rpm/load setting does it pop. I mean if your springs are mismatched or done,they could be limiting your revs.