It doesn't look like it will foul the steering column of a Sprite. Fabricating an exhaust pipe will be one job, making everything work together is another. Compression MUST be lower, 7.5:1 works well with pump gas. Timing needs retard or some clever to dial in retard with boost (MSD6BTM ignition, Megasquirt, etc.) or prepare to always run a bit retarded and rich. If you don't have the hardened axles or a 5-speed with Datsum clutch, you may find another weak link or two when you add this much HP.
That said, this will take a mild overbore (0.040 or so) and totally kick the poop out of a conventionally aspirated 1380, give loads of fun on the street, and get pretty good mileage.
Unlike my setup, the Metro turbo is limited to about 6-8lbs of boost since the Leyland engineers figured that this was all the trannys could handle. This is discussed pretty well in the Vizard "Bible".
Glen Byrns