The Optima charger will sometimes save them. I've had 3 or 4 come back to life but also had a couple beyond saving.

33 Plymouth Roadster - 383 - 5.90 1/8th 9.58 1/4
68 Dart - 340
66 Belvedere - 400

Windy Hollow Garage - https://www.youtube.com/@windyhollowgarage