25* F is not particularly cold for starting an engine.
A lot of hot rods don't have an operating choke. But without it, you have to compensate with your foot. Give it extra pump shots until its got enough fuel and as soon as it fires, feather it to keep going and then hold the throttle cracked open enough so it will idle fast. Then after a minute or two, slow the idle (with your foot). Until its warmed up, you'll have to keep your right foot on the throttle and use your left for (both clutch and) brake.
If you give it too many pump shots and it 'floods', remove the air cleaner lid and let it partially evaporate.
Or. Push the throttle to the floor and hold it there while cranking, until it clears.
Use your nose and eyes to determine the condition and reasons its not starting.
