I can't compare the LD 3 link to a torque arm.
I do have an LD 3 link in my '68 Camaro that's (so far) only street driven.
The LD 3 link puts a bit of noise into the cabin, not awful, but some. Exhaust routing can be a challenge. Unless the full floater is a bolt on, you'll be modifying the rear housing that comes as part of the LD setup.
You might PM David Pozzi and ask him his opinion. He's had a lot of experience with the LD 3 link in Bad Penny and the One Lap Camaro.
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Mike - '68 Camaro with some stuff done to it
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