My 78 truck has a new edelbrock carburetor starts fine when first started up after engine warm hard to start?

runs just fine but just hard to start after engine is ran|||electric choke, or manual? sounds like the choke butterfly isnt opening up, or the engine is getting too hot which can boil gas int the intake and puddle up in the bottom of the intake|||adjust the choke. It's running too rich when warmed up.|||do you know if its running rich. rev it up and let someone look at the exhaust. check you distributor. there could be a vaccum problem. could be the vaccum advance on the dist.