I just recently acquired a ‘77 C20 Scottsdale. I’m wondering if ethanol free fuel is the way to go? Am I wrong in thinking it’s less important beginnjng jn the late 70’s? Excuse my ignorance, please.

. This will be primarily a 3 season driver. I’m refueling every 2-3 weeks presently with the amount of driving I’m doing in the truck. Probably will not drive it much in the winter, here in Montana, except for during our brief warm spells when there’s no ice.
Any advice, thoughts on fuel differences is greatly appreciated. Thanks in advance.
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