you can water cool the head but not too much dont want to make it run troo cold get some lead piping ot copper pipe brake pip is a bit too narrow but it will do if thats all you can get ie its cheep lol

use potting compond for electronics wrap the pipe around the head use the potting compound get a water pick up and that shjould be okay
to run dont cut off the fins you need them to get rid of the heat ! i hope this helps