on the 1000 engine i have back down the coast it had like a pipe that ran down the side and out onto the ground

If you can get your hands onto a Datsun 1000
oil filler they have a breather built in. This means that you can weld the oil breather up.

If you are cornering really hard oil can come out of the breather too. That is part of the reason why you need a catch can when racing (the other is incase you blow your engine up). My dad was out on the track, going around a hard right hander, and all of a sudden the whole track was covered in black smoke. We didnt know what had happened, so it was towed back to the pits, we put the breather into a coke bottle, and it was partly filled by the end of the day. true story.

I am planning to make a catch can and plump both the tappet cover breather and the block breather into it with one of those small filters.
Just out of curiousity, what filter will be the best for the application?
The one's that have a wool kind of filter element or the one that have a paper element.

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that prob be the least of your worries id say...

plumbing back into intake = oily air running through your AFM/cooler/turbo/intake... thats the 'environmental' thing to do...

...catch.....can.....

not as much as when a turbo bows a seal and all the oil goes in the intake...

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Yeah and if you blow an engine fills the whole road with smoke.

yeah ive got a shiny little filter on the one thats fitted to the ute right now but im a minimalist and like everything hidden or just not there at all

having a breather on it makes a nice warm oil smell when you get on the gas, been considering having it returned to the intake like it should be...

With the turbo you will have plenty of sexy blowby and you'll need a way to get it out of the engine. Perhaps if you remove the rocker breather the crankcase breather will suffice, but I'm sure they put one there for a reason.

Also as far as I know the PCV uses the crankcase breather, the rocker cover breather just vents into the airbox.