Drill a hole in the tube right after the air filter and route the blowby back into the turbo. That's what MB did on the early 617's in the 116 chassis.

By the way, I don't get the point of that kit. I see no advantage over the OE setup.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13