Bridgestone Trail Wing tires came as standard equipment on my 2016 Suzuki DR650 (Yeah, I know, not a SOHC CB750) and they were wonderful on the street. They stopped well, and inspired confidence at the considerable lean angles the DR650 affords.
Wanting better off road performance, I switched to Continental TKC80's. Not much improvement off road, possibly due to lack of rider skill, and wretched on pavement.
I've since fitted up Dunlap Trailmax Missions and am thrilled by their street grip. Haven't had it off road yet, but, by the look of them, they'll be stout. They also look very cool.
I'm considering them for my 71 K1...