As far as I am aware no longtails have been converted for road use when I made enquiries with Lanzante back in the days when I was contemplating taking the plunge they told me that it was unsuitable for conversion on a number of levels mainly front overhang and would need major re-engineering to allow the suspension to lift when required, of course that was about ten or twelve years ago and technology has moved on so not saying it can't be done just that back tehn it was not even considered viable hence why they are almost all still in race condition.
No doubt people closer to these sort of things will enlighten us all. Any input MSO?