Long story short the car was a tbi car turned into a carburetor engine, it sat for about 8 years until I got the car.when you first start it up and take it down the road, it will run fine. But after you get after it, it's like it is hesitant to take fuel and misses, and will sometimes randomly clear up, it has new plugs, wires and distributor what could be my problem? Thanks in advance

 

Could be ethanol gas gumming up your fuel system

 

They advertise that the gas I'm putting in it is 100% idk if it's true or not all I'll put in it is 93 octane, the car didn't do this for the first month I've drove it. There is no inline fuel filter on it, I think someone done away with it, but there is one before the carb and I just replaced it