Hello, I just have a suggestion for the radiator. If you don't mind "Do it Yourself" you should look into heater cores instead of Radiators, they are cheap and cool better than PC water cooling Radiators. My favorite for water cooling is the 1977 Bonneville Heater core. They sell for $25 new and way less used. Just a suggestion, hope it helps a little.
I would sugest using compression fittings, much easier to use and have built-in clamping system. I have found several problems with barbs.
1. Must be clamped but often the clamps are hard to get on and many clamps are not reusable. Using cable ties as clamps helps but then cable ties are not reusable for obvous reasons.
2. Often difficult to slide the hose over the end of the barb. Using very flexible hose will help.
3. Difficult or impossible to remove the hose from the barb.
If you use barbs you will likely have to remove at least one or two at some point. When I have had to remove one the only way I could get it off was to slit the hose along the barb and then pull it loose. Each time the hose gets shorter and if you have used the shortest hose possible you will probably end up replacing it (neccesitating removing the other end the same way). Doing so could damage the barb causing increased potential for leaks (very scary).
Compression fittings are designed differently and, while they do damage the hose slightly, they are not as likely to cause a puncture unless you use a wrench to torc the nuts down very tight. (Obviously, DON'T Use a wrench to torc the nuts. Finger tight is good enough).