On the topic of batteries back in the day, all I can say is that someone screwed up pretty good in the engineering dept at GM if you ask me ! I have never seen a 67-72 that was not eaten up by battery acid

WTF happened to the great idea they had in the older trucks where the battery is out of sight and away from critical parts like core supports, inner fenders bottom of outer fenders . My 68 GMC only has 60k 1 owner from new but needed everything because it sat untouched with the original battery just leaking away on top of the front sheetmetal. Did no one look at a battery in those days ?