My bad. I was a bit short on details. My plan is to put the catch can into tho hose between the crankcase vent on the front of the injection pump cover and where it attaches to CDR valve on the intake to the banks turbo so it will be a closed system and the oil collected from that I was going to drain back to the engine. Is there issues with draining the oil collected by the catch can back into the engine?
If you are getting a ton of oil coming through here, you might want to move your CDR intake from the crankcase vent to the valve cover like they do on the ATS/factory turbo kits.
Add a baffle on the inside of the valve cover, and a hole through one of the round flat spots on it. This should reduce the amount of oil getting through the CDR system.
The problem with the front cover slot is that the gears right behind it are slinging a lot of oil around - from the oil pump down in the sump all the way up to the IP gear. So you get tons of droplets splashing around and getting picked up by the blowby gasses.
Now... nothing like this will "fix" having oil in your turbo(that's just typical of all IDI turbo setups with crankcase gasses), but it should reduce oil usage.