Well I got my A/C all lined out now after getting all of the extra oil out of the system but now I have a new problem. I have a 77 GMC with a 350 and I bought the FiTech fuel injection for it. I put it on last fall and I do not drive this truck much since the total rebuild of it but have been some now to get the a/c working properly. The truck is vapor locking and it really ticks me off. I followed the instructions to the letter and kept all of the fuel lines away from where there should not be a problem with heat. The only thing that is close to any heat is the command center which is on the drivers side of the radiator and not right up against it. My question is has anyone else have one of the systems and are you having this problem? What should I do to stop this?