Before you get surprised when posting photos on this forum, there is a limit to the bandwidth, which you may encounter. The two ways around this are to become a supporting member (recommended), or link from an external hosting site like Photobucket.
As for the cooling system being modified, over the course of 40 or so years, someone may have been forced to be creative with a repair, or thought they had built a better mousetrap. One good example would be the air conditioning compressor, power steering, and water pump. There are sources, but you will need to figure out what you have, either by description or photos, so the rest of us can herd you in the right direction.
Meddle not in the affairs of dragons, for you are crunchy, and taste good with ketchup.