It's always good to torque them, but I would just tighten them by hand. Tight, but not too tight. Never had any problems switching out 6 of them in my '62. It had a 283, 3-Speed at the time. When I was 16, no one ever told me that I could shift without leaving a patch of rubber, lol.
Now a Flywheel, that was a different story. We always torqued our Flywheels.
-Parting Out over 75 '58 to '73 Full Size Chevy Cars-
-National Impala Association
-Vintage Chevrolet Club of America