Touque Arm rear suspension

[Force Fed Mopar]

There's quite a few 750-1k rwhp 4th Gen Camaro/Firebirds riding around on the torque arm setup (albeit upgraded), and they mostly weigh around 3400-3600 depending on options, IIRC. Some of the drag setups use a shorter torque arm mounted to a new tubular crossmember bolted to the body, rather than the factory mounting point on the trans.

 

[747mopar]

Maybe for reference purposes you can look at, not nec. to buy
Chris Alston's Chassisworks design Torque Arm Suspensions
maybe get some ideas or engineer values to build your own

He sells a ton of them for Pro-Touring crowds

example
https://www.cachassisworks.com/c-1382-torque-arm-suspensiona.aspx

I've checked his out, nice looking pieces.

 

[Torkmnstr]

I just watched Detroit muscle and they put that torque arm and watts link setup on a fairlane. It is some nice stuff!