That was the plan back then. . .all jet bombers were designed to be primarily nuclear delivery platforms.
At the start of the Vietnam War, we really didn’t have our jets kitted out for conventional wars, from B-52’s to 105’s, they all had to be updated to perform conventional (non-nuclear) missions.
I think I once saw a video of a B-47 doing a an up-and-over maneuver to sling a nuke onto target. First time it had been done, IIRC