Hi guys and gals. I am new at this site and I am looking for some info. I have bought a 85 K5 4x4. The heater core was shot and upon investigation, a door on the distributor box was broke. So, I went to the local junkyard and pulled out a box from a Chevy resting in the junkyard. When I put it all together, the blower motor isn't working now. Anyone have any ideas what could cause that? The blower motor worked fine before I pulled out the box and now it doesn't work. Another question, the distributor box has 3 vacuum connections. Any ideas on what they are for? THanks for your help. By the way, I am going to try to get my site together with some pics..!!!