Replacing vacuum lines...

[draser]

Carquest, Autozone and OReillys do not carry the Prestone branded hose

Another option is to use a dedicated hose supplier, I use Belmetric for example. They have vac and fuel hoses in metric sizes. I just bought some fuel hose from them (again) for my current restoration (made in Germany fuel hose). Competitive price and quick delivery.

 

[STPaulK]

The vacuum lines are attached to the smaller 5 way tee and to the map sensor switch.
The othe tee style fittings you see are coolant lines.

I think we are not talking the same thing. The "other" five-way T uses the same vacuum hose as the five-way T most of these articles reference. I was prepared to swap those hoses out too but then discovered the T end is larger and one has to "elongate" the hose to make it fit the T connector (which is larger than the T all these articles reference.) Is this connection as vital to maintain?