Problem with my Carburetor ( i think )

[kevoisevil]

So i have been periodically working on my 86' gmc k1500 and now when i hit the free way and get up to 55-60 it acts like its trying to go but pulls back and go and pulls back. i have asked a mechanic and he said its either the carb is bad or the carb needs to be rebuilt and last but not least the fuel lines filters and all that are shot... i can drive it on the street fine but i just dont know wha tto do at this point.