I posted on installing hydraulic parking brakes before. This is a shot of my caliper mounted on the trailing arm. It is a light weight aluminum caliper with dual pistons. It also shows a grease fitting that I use to lightly lube the bearings and part of the offset trailing arm.
This is a shot of the end of the trail arm. The spring mount was cut off and plated over and a 5/8th nut welded in the middle. I allows me to mount the rear sway bar inside the large offset wheels. This can be a problem with a lot of offset.
It also shows the coilover mounts, the hydraulic parking brake and the 6 link mount.
This last shot shows the homemade offset. A stock set of trailing arms can be modified like this in about an evening without a jig. Just use a mig welder , a little metal and some basic tools. It is far stronger then stock. It has 3 walls, not 2 like stock and costs nothing but time. I do pull my trailing arms at least every second year for inspection.
Cars used hard like mine need a yearly inspection checking for warren parts, rod ends going bad, cracking, bearing play and just general refinish and lubricating.
If you get in the habit of regualarly removing these things is take very little time. Probably start to finish my trailing arm is out and on the bench in under Â½ hour. Everything is free, I do use anti seize on everything and all thread were chased at one time with taps, bolts have their threads cleaned on a wire wheel.