Head Vent, Head Vent Options

[Highland]

Engine configuration is stock with D-Jet except 2056cc and Elgin 330-1 cam.

I bought a pair of rebuilt 2.0 stock heads (seller says rebuilt by Brothers I think in Riverside) and only one head has a vent tube.

I've read Len's article on not venting the heads. So here are my questions:

1) Should I have a machinist install a vent tube in the other head even if I don't use it
and just plug it?

2) Is anyone running a stock engine with no head vents or head vents plugged? If so, any difference in performance. Gets back to question 1, if I'm not going to use it I'd rather not drill and plug a hole.

3) If I use the heads as is, does it matter which side I put the vented head (even if it's plugged)?

4) Is there an application where only one head vent tube is used?

Thanks

[Tbrown4x4]

Not sure about all your questions, but the passenger side head (3-4) is drilled and tapped for the CHT sensor. (I only have a little experience with 1.7 heads. Not sure if all 2L heads are drilled or not. Just make sure you can install a CHT sensor on the correct side.)

I think I would have a machinist install a head vent while the head is off the engine. Even if you just plug it, it will be a lot harder after the engine is together.