Honestly the only reason i ask is looking at the above R with the conversion there is a hell of a lot of modding to make it close to fit. One would think the legalities of getting it on the road would be horrible. They have cut half of the front end out.... Just depends if they did that for weight saving or because they had to.
Have you spoken to the appropriate people regarding the legalities of getting the thing registered?
Also you are talking about racing on the street, i would leave that part out on a public forum. We don't support that kind of stuff around here.
I understand you wan't little lagg and power. I understand you want to do something that no one has ever done. There are so many things to consider before locking into anything. The main two are obviously can it be done and is it legal when fitted.
Like i said i would love to see this be done, but keep looking into it man.