seems that since you added/changed a few parts a few weeks ago and thinking you solved a problem, try to find out exactly what is happening before changing or buying anything else. Several different things could be causing the issue as already posted, reread the items, get a few tools to take with you and go out in the hottest part of the day - it seems it will show up. You said the car was around 185, focus on something else besides heat soak - if no fuel at carb then check fuel to pump at the pump - this will take a little more time but it will be cheaper and you will have verified what some of your other parts that you haven't replaced are actually doing. definitely have some gas you can squirt down the carb
make sure you have plenty of time and leave the kiddos at home so your not scrambling and can wait it out