Farmall Cub starting issue.

UPDATE I pulled the valve cover and looks like some of the valves are stuck. I’m working on that. Also ordered plugs and new wires and a carb kit.

I picked up a Cub that sat a couple years.I emptied the gas tank and replaced the fuel bowl. New battery and cables. Has good spark coming out of mag #1 wire.
The spark plug wires are in the right sequence.
When I crank it I only get a couple pops out of the exhaust and sometimes some flames. Starting fluid in the intake doesn’t help.
Any ideas what’s happening, is the problem in the carb or the mag.
 
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I picked up a Cub that sat a couple years.I emptied the gas tank and replaced the fuel bowl. New battery and cables. Has good spark coming out of mag #1 wire.
The spark plug wires are in the right sequence.
When I crank it I only get a couple pops out of the exhaust and sometimes some flames. Starting fluid in the intake doesn’t help.
Any ideas what’s happening, is the problem in the carb or the mag.
#1 it would be better to post this in the Farmall forum.
That said I'd check the valves the Cubs tend to have sticking valves if they sat for very long
 
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