I thought it kind of strange that you didn't respond to me a couple days ago - I knew it was getting late in your part of the world and thought nothing of the fact that I responded to your question regarding resistance in the line (positive) from the battery to where it connects at the starter - I told you that the resistance measured was .00000. When I saw that, and leaning towards an electrical problem - and I have had some in the past - I took my battery down for a test - they told me the battery tests as god, but needs a charge at this time. The battery I was working with is a couple year old "Interstate" - the kind of heat we have in Arizona batteries don't last longer than 2 - 2 1/2 yrs max. So I decided to invest in another. I bought a good one with 8 yrs warrantee, three years free replacement, 850 CCA (1000 cranking amps).
I installed the battery and checked everthing to make sure that all was tight, torqued, and connected properly and attempted to start. The car did not start, but it did turn over - slowly like the battery was low or something like that, but not like it was when we began this extended trip a few weeks ago.
There is one thing I haven't told you - it just happened the same night I tested for resistance - we took all the plugs out - hadn't done that before - just 4 or 5 so that manually turning the engine would be easier. My buddy was taking them out and when he got to the last one - would be passenger side closest to the firewall, he got a quarter turn on it and suddenly it sounded like a gas tank does when you a low on fuel, it is hot, and the vaccume hissing noise coming from the tank and swish of air being drawn in to the engine - we had not had the car started and of course we had not turned it over manually for more than 24 hours - I could not understand why that one hole would act like that!?!? Any thoughts?
Anyway, I really believe we are down to an electrical problem - but that is why you and I are talking - my knowledge hasn't been current since 1971