Hi Chris I fitted the Koni Classic Type 80-1717 dampers to the rear of my Mk2 Vitesse using the damper Extension Brackets These Dampers are intended for the front of a Classic Mini from the 1960's I have attached the Pdf file of the Dampers, Closed length is 216mm, Open length is 296mm measure from the centres of the bushing, so yours sound slightly different? I used the original lower bushing but had to drill the metal tube out slightly, it was still thick enough though?