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Welcome to the forum.

Rough running until warm can be several things, from distributor being worn, so check the shaft play there, choke not coming off properly, carboned up crossover in the intake manifold under the carb, and as you said, the carb itself. Make sure all the linkage is functioning properly, might even pull the top off when it runs rough, see if the fuel level is high or low, or out of fuel (squirter can give an indication, if it squirts smoothly good, if not, carb rebuild), and running good after she warms up, still looks like carb issue, possible fuel pump if it does sputter a bit when warmed up.
 

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Additionally, double check your firing order to make sure a couple wires didn't get swapped at the pairs of sparkplugs.
1-8-4-3-6-5-7-2. it's on the intake manifold somewhere, including rotation, which should be clockwise.
 

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Change out the vacuum hose itself, see if there is a leak in it. Also, make sure the vacuum port is ported and not manifold vacuum, so off the bottom of the throttle blades.

Some have a return spring, some don't, and if the pedal doesn't return high enough to keep the brake lights from being on all the time, put a heavy spring on it.
 
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