Large stroked VW engines always seem to have breathing problems, as there's just not enough volume inside the engine case to accommodate the air in the cylinders under the pistons being pushed back and forth. If the builder doesn't open up the windows between the cylinders and notch the area between the center main bearing web and the top of the case there's just not enough area for the air to move inside the engine easily. If we can slow down this air movement, it won't carry so much oil with it.
I seem to remember being told (by someone in the know) that a breather that has 25% of the engine's displacement is enough for a street engine. A 2 1/2 x 15" tube is 1207cc's, which should be more than enough extra volume for a 2276. Will a 3" tube fit in the space? A 3x12" tube will provide almost 1400cc's, and the bigger diameter will slow down the air movement in the tube itself. This will allow more oil to fall out of suspension faster. Also, Gordon found that 5/8" hose cured his breather woes, as the larger hose itself added enough volume so the airspeed was reduced enough for a lot of the oil to return to the engine before it ever reached the breather. I think the hose size is really important here.
A couple of stainless or copper pot scrubbers stretched out inside the tube will give more surface area for the oil that makes it to the breather tank to condense on as well. Al