That's an A5 - it has the square cylinder, longer stroke, and shorter transmission casing.
Bosch Spark Plug listed on that spec sheet is the wrong one - use a W8AC Bosch, all the others are fine.
Ration Lists as 50:1 - you can go 43:1 to be on the safe side and for ease of measurement, 2.6oz to Gallon = 50:1, 3oz to Gallon = 43:1
Or use the injector, if you have one.
Cause it's an A5 - yes, you can mount the kit, although that is not reccommended.
Oddball bit - that engine can also be bored to 38.5mm and a Piston&Rings upgrade is available for it.