Which year KH are we talking about? The oil modification is, from memory, 1956 onward, but only required because they cocked up the oil supply to the rockers with a mod in 1955. Earlier models are no problem from this point of view.
36 4G, 37 VH, 54 KH(A), 75 Healey 1000/4, 52/53 ex ISDT KHA (project).
Former Machine Registrar & Archivist, General Secretary and Single Spares Organiser (over a 25 year period).
Now Archivist once more - but not Machine Registrar.