Washed, polished, waxed, head unit fitted and working.
Work to do:
HIDs (Kit sent was wrong one for reflector / clear lens headlamps) Reversing sensor (need to order new numberplates, as rear one needs moving upwards / downwards slightly to fit it, and the front one is mounted a few cms too far towards the centre for a 156)
No other mods planned, other than perhaps a K&N panel filter, to cut the cost of replacement on servicing.
It is lowered 15mm and on +1" wheels from the factory compared with non-Veloce models anyway.
Plugged it into AlfaDiag and everything was all clear - except the known airbag error - need to reset that once I've got a modded cable.