Outer Limits 4x4 Board

in process of extending all breathers on 94, 80 serries petrol.

no worries with the diffs.
However gearbox and transfer case i can't tell whats happening.
it seems as thogh they all interconnect and come out as one tube at the bottom of firewall.
Is this the case?
if so i thought i would just extend from here.
what do u's think.
steve

I'd drop the crossmember, and go with all new right from the box's.

The join from memory is to equalise the two in case of a seal failure..