Probably not, it would have to be like 1hp or more. I bet the best he gets is in the -45c range with full load.
Have you already considered using something like a TDX with a copper top? I say the TDX because it only has 2 barbs. That wouldnt be that tough to modify.
Also, have you considered putting the waterblock inlet tubing inside the return tubing? This would help lower temps and make insulation much easier, plus it would look similar to a prommy
