Popping thru carb when starting

Just curious;
what are we working on?
What Carb?
Automatic choke?
Did you ever have a carb fire?
Is it;
Popping during cranking? and
ALSO, popping during warm up? But
Ok after fully warmed up?
Have you tested the compression yet?
How big is your cam?
and does it have solid lifters?
You got the firing order worked out?
lol