I am working with a 1981 Corvette. The car is mostly stock with a 350 and stock mechanical fuel pump. The problem is this. I was removing the carb to do a rebuild on it. When I removed the fuel line at the carb I got a shower in fuel. The fuel was coming from the fuel pump side and was coming out at about 5 to 7 psi I would guess. I put a hose on the end on the line and ran it into a bucket. My thought was that it had pressure build up and it would stop after a few mins. I was wrong. The fuel kept coming and at about 5 to 7 psi. I pulled the hose off, got another shower, stuck my thumb over the end, got another shower, so that I could put a rubber cap on the line to stop it. Three days later I went to put the carb back on. I pulled the cap off the line, got another shower. With fuel going everywhere I quickly hook the line back up to the carb and cleaned all the fuel up! I have noticed this problem once before when it was 80 degrees out and thought it was a venting problem, but now it is like 30 degrees so I am not so sure it is a venting problem. Any thoughts about this?