i'd just sell your car and get a valver tbh the amount of work you have to do to do a conversion properly, brakes, suspension, etc i was considering buying a 1.4 rt to convert when i first wanted a clio then i looked into doing it myself which wouldnt bother me as im not mechanically challenged and would do it all myself but buying a valver was the far best option as you can pick them up cheap now and insurance will be the same (maybe more on the conversion) because only a right twit would fail to notify the insurance company of an engine change. Plus it'll never look like a valver/williams
Dave