Great this thread has come back to life, as my Uno is now SORNd, I have all the bits for a full sups steering and brake o/haul and am plotting a mk.2 Punto ELX85/Sporting engine and Punto-type gearbox.
The attraction of the latter wd be fuel consumption I can live with for the next 6yrs say, until all-electric really comes in. In a Punto it's nom 45mpg combined - in a lightweight Uno that shd be 50mpg at least. But that means the full MPI, CPU etc and all the faff of rewiring, coding etc. It also means settling for 80bhp, softer in fact than the mk.1 ELX85/Sporting. That shd still be interesting, as the standard 70SX is v lively already, but only gets 35mpg at best.
But it's interesting that a carb on a ELX75 motor (like my old blue one) liberates so much power, without the electronic complications. I already have a brand new 34/34DMTR, so that cd be a quick interim installation, jetted up as advised by Hyperdart above.
So thanks - great thread.