Thanks for the information much appreciated. Regarding date marks on the block, just underneath the manifold there is a clear D5 and at the base of the block there is a similarly clear 4A3 (raised characters on the block both on the manifold...
I have a query regarding a Land Rover 2.25 NA Diesel Engine serial number. The serial number on the block is SWnnn (doesn't seem to follow the published lists available on the web) and I cannot find any information out there on this numbering...