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 Looking further into amendments to the infobox, can I suggest the following for dicussion: 
 :Production 1967-2006 
 :: This is an article about the engine in heavily revised Rover form, so earlier production is not relevant or accurate. This is covered by the Buick 215 article. 
 :Predecessor 
 ::I have requested on the Talk page for the automobile engine infobox template that a new category of 'Designer' be added. This will be of relevance and value for many of the 20th Century engine designs, and in this case would permit the GM connexion to be referenced more accurately. I would propose: 
 ::: ""Designer - General Motors (1959/60), Rover (1965-67)"".  
 ::This could then facilitate the deletion of the ""Also Called Buick 215"" field, which is inaccurate. By that measure, the Triumph 1500 engine would be ""also called"" Standard 8, when the development in the interim years was sufficient for the engines to share almost nothing in terms of tooling or componentry. An RV8 is definitely not a Buick 215 - even the casting method was altered. This also adds to my above argument that Production should count from 1967 onwards, with the general purpose being to differentiate the Rover-ised engine from its design origins in line with what I believe is the scope of the article. 
 ::How do we feel about that sort of change (provided Designer can be added to the infobox)?  "