My understanding is that the 86 & 87 GN's have pink paint on the valve bodies and that is a dead give away the you have a TR valve body..What has anyone else heard??
Well, the valve body I got from postons has pink paint on it with no ink stamp. My valvebody in the car right now has the exact same pink paint in addition to the br3 ink stamp. Not worried about it though.
Another quick identifier is the presence of a single-prong, third clutch switch on the side of the valve body. I don't believe that any other models used that location.
Also, there are small numbers/letters stamped on the ends of the aluminum throttle-valve sleeves. They are as follows: