Should there be a grounding strap from the engine to the body?

'72 Dart w/318

Got the new motor in yesterday and spent all of today painting and prepping parts to go back on.

While making an itinerary for tomorrow, I remembered that the old engine didn't have a grounding strap. I know the battery grounds straight to the motor, but other cars I've worked on still had a ground going from the engine to the firewall. Did a-bodies not have this?