yeah from an Audi A4,A6 or passat B5 , that way the mounts should match up easier, then just upgrade the ecu to EDC15 with a suitable map to run it properly, but yeah there fine, these engines can produce 130bhp with a tune which from the 90bhp standard is a big improvement, I find the AFN better suited on low down revs because of the VNT turbo, as the AHU are wastegated turbos(although a stronger turbo ), they would both cost roughly the same to buy, so you have a choice really, the 1.9tdi PD engines will fit staright in too from the passats and A4's/A6's