if there are any sensors on replacement engine i would recommend that you put the sensors from the old engine onto it, reason being the plugs can be different and working parameters may be different and could cause problems.
I would recommend you fit a new waterpump that is the correct fitment for the engine as coolant flow may vary.
Also i would recommend fitting a new clutch kit at the same time. Nothing worse than haviong problems with it when its back together only to have to strip it again or it becomes a problem at a later date.
Also allow time engine swaps are not a five minute job i have just last week just finished doing a engine swap on my mate's gtv and that came complete except inlet manifold, i had to swap everything as there were lots of differences.
Good luck with swap do not rush and double check every thing as you go. Take photo's of things as you go it will help on the rebuild especially if you find it hard to remember things.
alfa enthusiast fully skilled mechanic specializing in alfa's