Bandit

On a 1985 Dodge D-250 there are two wires coming off of the starter the thicker off the two goes two the starter the smaller one has been cut up by the battery. I was told the truck was running last week and all they were doing to start it was touching it to the positive post with the other wire but when I do this the starter just clicks. I pulled the starter and had it tested and was told its good and I have power to the cab I.e. lights and all so were does this wire go and what do I need to do to start this thing

I just ended up with two technics dynamic microphone RP-3570A both are in the box but I can't find any information about them on the web the info I was able to pull up wasn't in English so if anyone. Could tell me anything about them,like what there worth,if anything that would be great

On a 1977 3/4 ton Chevy can I convert it to part time four wheel drive by just changing the hubs or do I need to change transfer cases too?