We've had these inconvenient weather cycles lately, nice during the week but raining on the weekend. I finally got a break this weekend and got a chance to replace the trailing arm.
Old arm comes out easy enough
Close up of the shock bolt, I wasn't able to drill very far into in
the new set of aluminum arms came from a '90 944 S2. The casting is a bit different, no bump stop pads, lightly trimmed, the abs ports are drilled out, and it's 1-2 lbs lighter than the turbo trailing arm.
Abs stub axle is slightly different
Finally back together, waiting on new cv boots since the new set I just put on disintegrated
Lastly updated engine pics, I replaced the oil cap with a filter breather to relieve case pressure under boost, and rerouted the oil out line to get it away from the exhaust