I have the new fuel pump. Its for a 69 350 and it's ports are both 3/8. The problem I am running into is that my fuel lines are all 5/16. I found out that the 307 (the engine my truck came with) uses 5/16 lines. Unless there is a way that I dont know of (very likely) I am going to have to redo the fuel line from the pump to the tank. Any suggestions