65 barracuda not charging PLZ help

If the VR is only grounded to chassis by it mounting screws, the chassis ground jumper needs to be in place. Check resistance between VR case and batt' neg'.
many years ago, a buddy had 68 Nova. He says it would repeatedly loose alt' or VR or both. 'So I didn't have any test equipment with me, I say, "hell I dont know bud" while just standing and looking. When I noticed some oily electric tape dangling from where battery ground cable attached to block, I gave the wire a little tug. It pulled right out of that lug/terminal. That was the root problem.