It was running ok, now it’s terrible, I need help!!!

You might have ignition issues as well, but if you're getting pops out the exhaust, especially from an old motor that's been sitting for prolonged periods, I think you're looking at one or more stuck valves. Less popping at idle/more popping with increasing RPM because the faster the engine runs, the less time there is for the valve to close, so a sluggish one will make itself more and more known at higher and higher engine speed. "Until the popping stops" the valve eventually loosens up enough to work enough better to keep the intake charge in the cylinder rather than spitting it out into the exhaust. You don't necessarily have to pull the head; go at it this way.

As for the ignition:
10° BTDC is a little much. 2.5° is the spec; they'll usually run very well at 5° to 7° as long as there's not too much carbon in the chambers and the spark plugs aren't too hot. Find tune-up parts and technique suggestions in this post.