Cinquecento/Seicento 1.4 engine into a cinq (useful info and links)

1.4 16v stilo engine (the more bits you can get with it the better as you can sell on these spares)
supersprint manifold (code SUP814401 ) or similar
You have the option to fit the stilo inlet manifold (if you silkaflex the engine mounts and remove the firewall cover) but you will need a spacer made for a suitable throttlebody and the 1.2 16v MAP sensor.
1.75 / 2" bore exhaust
A gearbox that can handle the power (i used the 6 speed that was designed for the engine) but this creates more work. A 1.2 16v gearbox should suffice.
1.2 16v ECU and engine loom or standalone (many options available)
1.2 16v alternator
Cinquecento engine mounts
1.2 16v Coil pack mounts and coil packs (or 8v packs in the punto sporting mount )
1.2 16v Ignition leads
cinquecento alternator belt
stainless steel cable ties
Cinquecento driveshaft cups from cinquecento gearbox
Gearbox oil
Engine oil
Coolant
2 new front hub nuts
some sort of induction kit
uprated fuel pump, such as the fiat stilo, punto gt, or even the ford rs2000 iirc. The possibilities are endless as alot of walbro pumps are interchangeable, but double check on the forum first.
Fuel pressure regulator, something like a SARD is perfect although a couple of us have used immitations to good effect
Fuel hosing (high pressure)
silkaflex or tigerseal (optional but recommended and required if using stilo inlet)
I would say minimum 14" wheels (needed for GT brakes anyway) or the wheels will just spin
Fuel pipe T piece
handful of hose joiners for fuel hosing and coolant hosing
Coolant hosing
Lots or jubilee clips
Cinquecento gearbox selector mechanism (if fitting 6 speed)
Cinquecento clutch arm (if changing from hydralaulic clutch, highly likely)
Cinquecento gearbox speedo worm drive
Cinquecento haynes manual and punto manual came in very handy
Coolant pipe from cinquecento
Sealing ring for coolant pipe above
Fabricated Engine mount spacer (optional, but means less cutting of mount)
Fabricated Spacers for alternator
Some sort of spiral wrap for the wiring harness
Fabricated throttlebody spacer (recommended)
Cinquecento coolant temperature sender
Steering lock reducers or wheel spacers (if fitting a 6 speed box)