Can't shake vapor lock issue!

I ran Seafoam through the carb and then put the other half in the tank and ran the crap out of it after it got up to operating temp. Ran extremely well, ol 318 pulls alot harder with the different fuel pump and having the carb set halfway right. Ran around town after that and had no die at idle issues. We'll see if it keeps running good. Even with 2.46 gears, itll finally boil the tires!