I'm pleased you didn't mention the RLA & RLB - the last of the loop scavenge Sulzers. They weren't as robust as the RNDs or RND(M) engines.
Or, as I discovered on the Traquair, which had the last engine built at George Clark NEM on the Tyne, she had RLA running gear but RLB heads, as I discovered when I had to order and fit a new cylinder head, only to find, to our horror, that the supplied head was taller than the one we had just lifted, and nothing would therefore connect. There were some very red faces at the supplier's premises - and a lot of <ahem> 'robust' language on board