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

[McMark]

I don't think the difference between vented and non-vented is significant. So I'd say feel free to go either way. With the following overriding caveat: carbs and ITB do not benefit from head vents.

I would also recommend against only using one. Either vent both, or plug both.

75,76 models had no head vents. Drilling the unvented head then plugging it, sounds a little silly. Just leave it.

I suspect the 75/76 didn't have head vents because they would disrupt the L-Jet fuel injection.