Car feels like its missing...

Hey guys, for starters a little mods list. I have a 393w, quick fuel 850 carb, nitrous plate setup, afr heads... Ok so i dont drive my mustang that often, its sits usually all week until the weekends. Anyways i took it out the other day and for some reason in lower RPMs the car felt like it was not firing on all cylinders almost. tering really badly at takeoff and in lower rpms in all gears, but when i take the car over around 3k rpms it drives just like normal. Almost like somebody flipped a switch and it instantly drives better. I checked over everything and had a small fuel leak from one of my nitrous solenoids and i fixed that problem but it didnt help. Any ideas of what else i should look into? I was thinking about checking my plugs, and seeing if there was any trash stuck in the carb maybe. Thanks

Any idea's anybody? Think teflon something is stuck in my carb somewhere?

Hey guys i got it figured out, some of my plugs were melted through on the headers...