I HAVE A 1973 CHEVY C10 THAT I CANNOT FIGURE OUT WHAT'S WRONG. IT BOGS DOWN WHEN I TRY TO GIVE IT TOO MUCH GAS. I PUT FUEL LINE CLEANER IN IT, CHANGED THE FUEL PUMP, CLEANED OUT THE LINES AND PUT A NEW FUEL FILTER IN AND IT IS STILL DOING IT. IS THE PROBLEM THE CARB? ANY SUGGESTIONS WOULD BE GREATLY APPRECIATED!!