67 barracuda starting issues
I've got this 68 fish in the way here that I start a couple times each year. Every time I set a battery in, I know I'll need to feck with the cheesy replacement battery terminals until just clicking becomes starting. Those cable ends really are worthless chit but that car doesn't need better while it just lays here.
In many cases, a starter problem is in fact the starter. Story of a local guy that replaced the starter in his e-body B'cuda,,, I don't recall If he told me where he bought that starter, if it was new or reman'd , while I was helping him load the car on a trailer. He did say he had just replaced it and it worked perfectly, all of 3 times. "Got me out of the garage and to these gas pumps."
Back to the proverbial drawing board / diagnosing was his mindset. I mentioned that the modern mini starters are very popular option today.
Couple weeks later, at a local cruise-in, he reported that a POS reman'd starter was the culprit.
He got his money back from the part store, then went to a parts yard and bought a late model mini starter. "It looked damn near new and works GREAT".
So... whatever route you choose, Good luck