Yeah Fraser Cars in auckland also recommend i fit one to the exhuast side, which I initally planned to do, but I was convinced by a friend who rebuilds head to place it there as it was the lowest point in the head we could actually tap into with out getting to close to the water jacket seemed to work awesome as well
Also BTW Fraser sell spacer plates that allow you to run the stock 3sgte flywheel and starter its just small plate they machine up thats spaces the starter motor out
As for the thermo hosuing it was one we had lying around from a Datsun (Ewww Nissan I was a little bit sick in my mouth when fitting it) 180b no idea on the motor but it fitted and worked mint