The centre number plate looks correct to me. An MT 110 lamp should fit it perfectly. PM me if you need the info to use a single filament bulb in the MT110 as both Stop and Tail light - both the Red Hunter and 4G use a well tried system for this.
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.