Hi Mike
I presume you haven't got a workshop manual, if not it would certainly be worth getting one.
It covers all Delta 4wd variants, from the HF4WD to the Evo. Its about two and a half inches thick!
Plenty of info on the engine including step by step photos of dismantling and re-assembly.
I obtained mine from Omicron but presume it would be available from other specialists, you could also
try Mercian Manuals(01676 533304) who reprint workshop manuals.
The only thing I thought of to be careful with was tensioning the cam belt (I would replace all belts AND bearings).
As usual there is a Lancia special tool (weight) for setting the tension although an experienced mechanic could
probably do it by "feel".
With regards to running in, I'm with Simon and also would definately change the oil after a few hundred miles. Don't
forget to let the car tickover for a few minutes after each journey before switching off the engine this helps avoid heat soak
from the turbo.
Regards Steve