1977 Chevy Silverado stopped running and wont start

Someone asked a similar question about their c-10 and the answers were
very helpful, I just thought it would be useful to ask it again since my repairs
my 1997 has is a little different.

Basically what happened was at first it would run a little, then stop. Then
we'd start it and it would run for a little and then stop. This would happen a
bit but it started to run relatively smooth for a bit so we kept driving it further
and it was doing well until it stopped and would not start again after that.

It has a new starter (slightly under a year old), new battery (slightly under a
year), new carburetor (couple months old).

It was running relatively well but we had to get it smogged so we took it to
the shop. Since we're in California and it is an old truck it took several
months for the shop we took it to to get it pass smog. Someone we talked
to (the person who towed us when it broke down and wouldn't start LOL)
said that sometimes in order to get the old automobiles to pass smog the
shop will alter things a bit that can mess with the autos ability to run.

I am pretty new into auto mechanics, I have been interested in cars for a
few years where I read some books and I've done one semester of
Autoshop 2 at my highschool and am currently interning at a shop.
I believe it is a C/K 10 however I am not sure. I can find out and give an
update if it is necessary!
Thanks in advance!