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That's the proper PCV system for your B21F. Be sure to make sure the rubber ring in the oil filler cap remains soft and fexible to make a good seal and not hardened and brittle. These often need replacing every year or two. Make sure the hose in the cap is also well seated. Check the bottom of the air filter more frequently to make sure it's not getting too oily, which can attract dust and start to reduce airflow.
A good guess on your part, I'm impressed. There was indeed an aftermarket relocation kit from the likes of IPD to raise the flame trap for better accessibility. For an older engine, cleaning the flame trap element is often required and should be checked at every oil change, sighting through the holes for daylight. If it somehow happens to have the original layered copper style element (which were available as old stock from some aftermarket places until not that many years ago), they more easily get fouled and plug up with carbon, so should be replaced with the newer plastic style flame trap element with the holes that can be reemed out with a drill bit as needed. The plastic flame trap housing can become quite brittle from age and heat, so don't get carried away trying to get the element out for cleaning. If needed, clean it in place and rinse or blow out the debris. I usually finish with a rinse in paint solvent followed by drying.
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Dave -still with 940's, prev 740/240/140/120 You'd think I'd have learned by now
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