It is an older TCI valvebody. www.tciauto.com


It is an external solenoid style. TranzAct makes 2 models, one with external solenoid, one with internal solenoid. The internal solenoid, P/N 121900 or 121901, (Safety Neutral).

TranzAct website:

http://www.gotranzact.com/valvebodies_page1.html

The bracket race transbrake is similar to your TCI unit with the external solenoid that screws into the hole where the neutral safety switch was installed.