I read through a bunch of old posts to find out that it is possible to fit TBS risers to a Thunderbird. My question is what size and length bolts are needed to accomplish this? I have a 2001 Thunderbird with Speed Triple bars mounted to the stock T-bird risers. I'm trying to get a little more height and just a smidgen more pullback. I just acquired a set of TBS bars and risers but the mounting bolts were not included. Can somebody help me out with this one? Thanks in advance.