in order to make mine a scuba diver i painstakingly rebuilt the distributor, and as i was putting it back together applied sealant to everything i could, particularly the drain holes in the bottom, the grommets and fittings, and the vacuum advance unit and ignition amp.
the dizzy cap was then drilled to accept two 1/4bsp 6mm push in fittings, with one pipe running to the snorkel, and the other to the inlet mani.this now constantly draws fresh air into the dizzy and evacuates any moisture. we also designed a 2ltr coke bottle dizzy shield, which works very well to keep the jetwash effect at bay. electric fans are also fitted btw.
with a quality set of leads and new plugs, with the leads greased and cable tied at both ends, it now refuses to misfire, even after a heavy run in deep water.
the first time it worked we were wading through just over the bonnet, then hit a hole which ducked us down deeper and sent water up over the roof, which then came to rest just at the bottom of the screen
she scrambled about for grip for a while (seemed like ages) and then she began to drag us out, which she did, still firing on 8.
the engine was sweet, i was overjoyed (hours and hours of ****ing about sealing and trying things had finally worked)
needless to say the onlooking diesel owners appeared suprised!
it can be done