My good friend and fellow Ellena owner - owns car 0835GT - 57 Ellena He has a later 250GT engine installed in it - and it seems to have been that way for a long time per his research. With his permission, i said i would post the request on F-Chat - considering the Vintage Ferrari and international coverage of the web site. Here is his info he sent to me - compliments from some years back from Marcel. "0835 GT was originally sold new thru official Ferrari dealer Garage De Montchoisy SA in Geneva, Switzerland. In about 1970 Dutch dealer Rob de la Rive Box, resident in Villmergen, Switzerland, bought it from an unknown Swiss owner." "I have original sales paperwork from Rob Box showing the sale of my car with a used engine installed. So it seems reasonable to assume that my engine was removed in Switzerland." Any info, leads and stories as to the whereabouts of engine 0835 GT would be greatly appreciated.