Replacing throttle coolant hoses

The other day I ran into a neat problem. The solid metal coolant bypass line developed a pinhole leak. I've always had issues with the cooling system, so when we used JB Weld on the area (and it worked!) the van acted better than ever and didn't get as warm as fast as we tested it. We let it run and run, burping the lines, so after some time we noticed it was still releasing large amounts of air and bubbles, which posed a concern. I drove it for a bit and it never seemed to want to cool now. When I stopped and opened the hood, there was one easy hose leaking... but I saw something else... I investigated and one of the hoses near the block on the right was spraying. Upon further investigation of what this may be, I was able to track down that it's one of the 5/16 hoses that apparently go to the throttle body. The pressure on the system pretty much put too much strain on old hoses.

After relentless searching, these hoses are only briefly mentioned. How does one go about replacing these? My friend who worked on the initial problem doesn't believe it's an easy fix, but I'm trying to stay optimistic. A step by step would be fantastic so we know exactly what needs to be removed to access these.