As far from JBS as possible !
The PD170 turbo is electronically regulated rather than a full vacuum system on the PD140 turbo so that would have to be converted
The PD170 turbo is mounted above the manifold not below it like the PD140, thus also a different downpipe/CAT etc
The intake pipework is different on the PD170 turbo to the PD140 one
Could in theory be done, would cost a fair whack though and both turbos use the same size wheels very little bhp would be gained.
06 Audi 2.0 PD140 Sport TDI Quattro S-LINE.
Old engine 330 bhp @ flywheel 263 bhp @ wheel 490 lb torque.
Audidriver write up HERE
Now stripped and playing with an uprated Cryo treated engine fitted with bigger turbo,water/methanol,uprated injectors etc etc.Wanting 400 bhp and 500 lb torque.
Other car 500+ bhp MK4 Golf R32 turbo