Last year I put a brand new 750 carb on my vet.(427/435). I have a guage that goes into the chrome metal line that i got from summit. I heard that when it gets real hot outside that carbs run like garbage but it was 70 degrees in Chicago this weekend and I drove the car and when I got into a little traffic and the car would heat up it was hard to keep the car running. If I gave the car gas it would die out. I do not know whether I should get an aluminum radiator with electric fans or is it because the fuel pressure guage is only reading 4psi. I know that it should be at least 6psi but when the car is not in traffic it was fine. it was just embarassing to have the car cut off under a bridge in traffic with the top down. Any suggestions.