i had an arosa (same thing) and corners were scary till it got lowered. serious body roll.
how about the rear vw badge? everyone fits lupo ones to golfs so why not fit a golf one to a lupo? 
1.8t in a lupo, very common now but dont go thinking its an easy job, apparently a LOT of work involved.
what about the mk4s seats? ive seen mk4 recaros in a lupo but im guessing they swapped the subframes over, would be a lot more comfy than the lupo ones.
yeah, if the conversions were piss easy i would have gone with it but not got the time or money to piss about
