hey guys. my truck is too squeaky! 63 c10. every little bump in the road and something is squeaking like crazy. I properly mounted my bed (PO had the bed mounted to fram with in 1 spot at read drivers side only

) that cut down on the noise but still getting a lot. I have new cab mounts and will get those replaced on evening this week but what are some other places i can check for squeaks? it sounds like something inside at the firewall or dash but i can't seem to find it. Any ideas?