I have a 85 Blazer that has a holley carb on it that runs rough. I want to go back to a quadrajet so i bought a q jet from a 86 blazer. The problem is that the person who had the blazer before me destroyed the vaccum system around the carb, so there are missing lines and excess lines and a real mess. When i was looking at the 86 model carb i noticed an electrical connector on it(not the choke but something different). I don't see anything that looks like that on my 85 blazer. Should my 85 have the electrical connector? Can i use the 86 carb without the connector hooked up? Would i be better off getting an older carb?