My TVS is not doing what it is supposed to do according to the extensive reading I have conducted the last days.

The car is a 69 with 350 and auto. No two-way vac. distributor. Manual says three of the five ports on the TVS is to be used, and everything seems to be correctly hooked up.

Pete Serio has a write-up on this in the FAQ section which makes sense to me, but there is a drawing of the various ports and hookup that does not. The excerpt from JimC´s site makes more sense according to the plug layout and my testing.

It is close(port vac to dist.) when cold, but is open(man.vac to dist.) at operating temperature. I don´t have exact temp reading, but my new repro rally gauge reads right in the middle, and everything seems fine. When starting from cold I can observe the temp needle going slightly over middle before the thermostat opens and it settles around middle of scale. No way it reaches 230 in my book.

So, do I have a faulty TVS?
Is there several versions of it around, perhaps with other temp limits?