The thermostat housing are bspt so it's off by one thread per inch, I just did a reap to a npt. Don't know how wel it's worked yet thanks to the motor on a stand but seems tight with no slop with a drop of silicone on the threads.
I've got a stock t3 thats rebuilt with 0 miles on it with a bl turbo blanket on it as well as a 2.5 down pipe that I wrapped and have it open to a 3 with v band on it.
Looking to get 400 plus shipping.
Shoot an email for photos.
Oblivions13chaos@aol.com
I bought becks stuff made in Japan and not tiwian. It looked great fit awesome only qwam was that the main timing gear was cast and not machined like the oe one, but I'll live.