I am replacing the 10 Bolt in my '70 Skylark Convertible. Going with the aftermarket Trailing arms and rubber bushings. Is it worth it to pay the extra $100 for the boxed arms? I don't drag race or anything like it, just a cruiser. Would it help with daily driving, turns, etc.? or not worth it? Thanks for the input!
While the factory arms are adequate, if you aren't going for more solid aftermarket arms, it won't hurt to buy boxed ones. If you have or want a rear sway bar at some point, it is a good idea to have boxed arms. They help stiffen the suspension up a bit. Most wouldn't notice but it adds to it.
Boxed is nice. I added a rear sway bar and they make it very simple. Have any welding skills?? You can get the plates to box them in pretty inexpensively and DIY it if you have access to a MIG welder. https://www.opgi.com/chevelle/RCAI001/
If you have a rear sway bar, it may already have boxed arms. That is the default configuration from the factory if it came that way.
Many rear sway-bars added after factory build were bolted to the open rear arms. Spacers/tubing was placed inside the box to prevent them from collapsing. Factory rear sway coupled with a beefier front bar will make daily driving better. Body lean on the turns will be minimal.
My trailing arms are not closed, factory originals. I will get the boxed! Thanks. https://www.ebay.com/itm/NEW-68-72-...REAR-TRAILING-ARMS-WITH-BUSHINGS/292378422203