Hi Jake do you have a factory assembly manual, it may have something on the core support as to how many spacers and washers it requires. I had to put each bolt in and barley start the threads and move things around so the bolt holes would line up as they allow movement in each direction up,down and back,forward. Sometimes it's like Murphy's law and it's nice to have help with it while your under the truck though. Good luck with it...Vernski
