If you have the bare engine out of the car this is what id do.
- Sump off change the pick up pipe
- Timing belt and water pump change
- Rip out all the breather PCV system fit a catch can
- Inlet manifold off and rocker cover and give them a clean/polish/paint.
- Gearbox off empty oil/refill with new and paint.
- Turbo off refit with good K03s if you have AGU engine code.
- Exhaust manifold off and port the inside for better flow.
And finally give the engine a really good service change the plugs, oil filter, oil, G12 coolant etc.
The above is alot of work but with engine out of the car your laughin and youl end up doing everything anyway. Imagine fitting everything and constantly having problems.