93-94 have the pair system, the pair pushes air into the exhaust system to help heat up the cats quicker and this is done via the exhaust manifolds. you can see where the ports are just by following the hard lines coming off the pair valve...
i always used some electrical tape around the joint to keep them from flopping around and dropping a bolt. 1 or 2 wraps is enough to allow it to still flex pretty easy
for the seatbelt theres not really anything that you can do, its doing what its supposed to do. theres a mechanism in the seatbelt assembly that is supposed to lock it if your rolling over. easy fix is to try to pull out a little more seat belt...
i had the napa eclipse on my truck and had no issues with them for many years, it was way more cost effective even with my price from the dealership and lifetime warrantee. i was working at a dealership at the time and my price was 10% over cost...
wouldnt even trust them to do that, they would probably try to pick the truck up by the body and not the frame. seen that before
depending on what the max pressure for the tire is i would recommend going to 40, higher tire pressure will give...