Crankcase ventilation, Should I be worried? Options

[edwin]

Have had the car back on the road about a week now and have put nearly 1000km's on it (you do the math)
Have used nearly a litre of oil and i am sure that nearly none of it has been burned as there are signs of it all over the floor of the shed and the engine bay. one of the plugs I had on the right hand head vent came off and oil has sprayed everywhere in that area.
I also put a breather filter on the oil fill box and there is lots of oil in the filter and on the box itself.
Not sure if this should be worrying or normal.
I plan to make a breather box when i get some time soon and am still debating plumbing the breather into the intake.
Look forward to ideas and opinions
Edwin

[edwin]

Probably should have said most of that first.
Engine is a 1.8 and was running and using no oil.
PO had the engine rebuilt and it feels very strong.
I've just done a conversion from the terrible dual 32mm carbs to aftermarket EFI with quad throttle bodies
Only filled to the top mark and now shows just above min.
I expect the plug came off the head while a friend was driving and i was tuning.
We hit a corner pretty hard just under the limiter in 4th and the oil light flashed mid corner. That run i was tuning for full throttle high revs so it would build crankcase pressure anyway.
My big concern is the oil fill box which just has a filter in the breather port without a pcv
Cheers
Edwin