[ROVERNET - UK] 2000 engine?

[John Burkhard]

This question has to do with the 1963 to 1975 Rover 2000/ 2200, SC/TC, 
engines.  Is this a interference or collision, or non-interference or 
non-collision engine design?  That is to say if the camshaft drive, top, 
chain is removed and then the crankshaft is turned, will a piston collide 
with a valve in the open position and lock up the engine or bend the 
valve(s)?  Thanks for the help.