The 2 litre version of that engine won countless rallies in various cars, it's a terrific engine. I have it in my 85 plus 4.
It's by far my favourite and I've had a 1600 xflow, 3.5 rover, 3 litre v6 and latest 1600 ford in my mogs. The fiat engine is really flexible and sounds great too.
The gearbox on the other hand........is an acquired pleasure.....