Haven't got any pics of the complete system, but for some reason, I've kept my home made socket 7 water block from the late 90s all these years. Dug it up and snapped a pic for a ghetto modding thread in another forum a while ago, might as well post it here too 😀
vattenblock.jpg
Basically it consists of a piece of copper sheet in the bottom, some coiled up 6mm soft annealed copper pipe, and half a roll of regular electronics solder. My crafting skills were perhaps not all that developed, but keep in mind I was an impatient teenager then, and just wanted to get on with the experiment 😁
Used it together with an extremely noisy centrifugal pump and the oil cooler from a scrapped motor cycle. Worked surprisingly well. Can't remember any specific numbers anymore, but ran an AMD K6-2 (or perhaps it was a K6-3) at quite remarkable speeds with it.