One of the things I did on my 280SL engine bay over a period was remove one item at a time and repair if needed, repaint, add labels as needed and return with new hoses, bolts, screws or clamps as appropriate. Does not get it all done quickly but it slowly works through the engine bay and eventually gets it looking very presentable. That way you tend to work on one item, and by pre purchasing expected parts, the car is not off the road for long periods and you still get to enjoy it as it is slowly restored.