Re: What spare parts & tools do you have in the trunk?
It varies greatly, I always keep a spare new and a spare used serpentine belt, and a hose, and a 5/8" wrench behind the seat. I had a pulley alignment issue that is MUCH better now, but still not perfect. I had to trim the width of the belt by 1 groove... Never had a problem, but so easy to swap out and fix with just a wrench on the tensioner. Plus my upper hose is routed like a drunken sailor meandering around the alternator and is 2 hoses joined by pipe.
Other than that embarrassment, the only time I carry tools and spares is when I go to Detroit for the Woodward Dream Cruise and put about 1,000 miles on that weekend. Still only hand tools, a normal wheel/tire instead of the behind the seat ancient spare, coolers, chairs, rolls of paper towels and duct tape. I figure what ever is actually needed won't be what I brought, so just drive it, if something isn't reliable fix it first.
But with an El Camino, it is easy to just keep tossing stuff in the bed under the cover, and next thing you know you need to pump up the air shocks to keep the headlights on the road.
When me and my dad drove it from Las Vegas to Pittsburgh, I brought everything he had for it, and the bed was full, plus our 2 small bags for clothes. Only issue we had over the whole 2289 mile trip was 1 quart of oil, 1 low tire at a morning check, and an exhaust hanger cracked last day.
1967 El Camino Malibu - Deepwater Blue
ZZ4 350, FiTech 600 complete!,Roadmaster tank, 700R4, Underdash A/C in progress, JGC Steering, 1990s truck serpentine.