Check and make sure it's getting spark and then if it is you might want to make sure it's getting gas inside you said you out a new like but it could be its not getting gas inside the cylinders

Its not getting enough gas to the carburetor

It is acting like its NOT

That truck should be TBI not a carburetor, ive came across this problem several times on these trucks and its been the distributor every time, pull the cap n rotor and look at the stator at the pick up coil it should appear it damn near touches it .....if u see a gap bingo!!! Good luck hope this helps

i agree with chuck i think its the distributor... if its not then i would also check to make sure that when he did the pump change he cleaned the tank as the pick up could be clogged if the old pump fell apart or the tank was rusty... doubtful but possible.

Cam sensor