Two thoughts:
1. Looks like you're using PVC for the charge pipes coming off the turbo outlet, and forward along the top of the frame. I used PVC to build some IC piping for my mk3 supra... I sleeved the ends of the pipes where the clamps went on to keep them from deforming when heated. I think the one running forward on top of the frame will be fine, but that short peice coming off the turbo outlet will see some heat. You can get a short peice of 2" exhaust tubing, cut off a ring 1" wide and put it into the end of the PVC.. done and done.
2. The body will flex a bit on the frame, so check and make sure you've got at least 1/4 of clearance between the body and that PVC, or you may get some interference/noice when you're flexed out.