Help! Engine Won't Start...Sih

[JustLearnin]

Ok, I haven't worked on engines since my teens, when I did so out of necessity (no money means doing it yourself). I have a '72 Blazer with a 350 and an Edelbrock carb, both new; also new fuel pump and coil/distributor system. I've been driving it without issues for the past month, until now...

I drove it yesterday morning, and then parked it in the garage. When I went back to start it, it would turn over, but not fire. It almost did at one point. I could smell the gas so I left it alone for several hours thinking maybe I just flooded it. Went back out this morning and it still doesn't start. Can any of you give me some pointers as to where to start looking, what to check? Thanks!