Please let us know.
I remember a fellow LR enthusiast and his wife who have passed from Greece on their way to NZ by car. They were travelling in a Defender110 V8 (3.5 with LPG) and have started to have problem with the engine.
It turned out that their spark plugs, high tension wires and distributor cap needed replacing.
After that their V8 worked like a pussy-cat until they arrived in NZ.
(those interested to read about it can check here
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and read about their days in Greece) Take care Pantelis