383 won't start. It cranks, I have spark & fuel - could it be the battery

Wow, thanks for all the input and advice everyone! She fired up last night. The last time I checked I had spark, so I just assumed I still did... I know, I know, never assume. Turns out it was just the cool wire that was loose! Smoking a bit though, so I guess that is from all the raw fuel in there. Today I will clean the plugs and adjust my carb.