Did you hit a really big bump in the road?
One of several things happened.
1. A wire is loose on the back of your ignition switch, or the ignition switch has a bad contact somewhere in it.
2. You have too many keys on your key chain, that when jarred by a large bump caused the above contact to momentarily lose contact, resuming contact after the bump.
3. Your distributor has a loose wire.
61 II 109" Pickup (Restomod, 350 small block, TR4050)
66 IIA 88" Station Wagon (sold)
66 IIA 109" Pickup (Restomod, 5MGE, R380)
67 IIA 109" NADA Wagon (sold)
88, 2.5TD 110 RHD non-hicap pickup
-I used to know everything there was to know about Land Rovers; then I joined the RN Bulletin Board.