Had my '56 plate legend converted to LPG at the end of March, and wonder if others have been through the process. too early to comment on performance and durability so far, but hopefully this will make this an 'affordable' mile muncher. I can comment on price and spec. of conversion. Prins VSI 2.0 system with 76 litre tank (fills to 65 litres), offers 325-350 mile range at 71.9p per litre. I also have Prins valvecare fitted to extend life of valves and valve seats. (this is the big variable in terms of durability for me). total cost £1830 plus 5 days without my car. i'll keep you all posted as to any performance, maintenance, reliability and durabillity issues. My car is a '56 Legend in Lakeshore Silver, ADAS & CMBS, parking sensors, mudflaps, 17" wheels (now back on summer tyres). I'm the second owner, car has now covered 30K miles (had 22K when i bought it in November).