Tag people.. am absolutely shocked !!!! I always thought that I have a 351 Cleveland under the hood!! But now the disillusionment..have finally taken a closer look at the engine and I have identified it clearly as 351 Modified (a Cleveland and Modified are hard to keep apart, but I have seen it on the basis of the cylinder heads!! At Cleveland there are 2en for 2bbl and 4ren for 4bbl. Leg Modified stands there M for Modified ) Was there probably too good faith when I bought the thing, because I could be sure it was not a 351 Windsor and the seller specified it was a 70-72 Cleveland installed. So I did not control the very small differences. Was also a US car workshop, and they should know what they were selling… Even if it was about ebay. Well my question: Do I have any possibilities to turn what with the seller ( goods were not properly written out ) ! Seller comes from Switzerland … or you see there black ( what I knew about it was not so well known!).