Mine is for a 68 but i think they should be the same.  there should be a bottom bracket and some mounting hardware as well.  here ia link to a pic showing the bottom bracket.
http://www.lsxmag.com/features/sema-...or-69-camaros/
  the mounting hardware that came with mine included three bolts/nuts/and spacers.  i could not figure out how to incorporate the spacers, so installed without just fine.  I called C&R and discussed the spacers and did not come to a final conclusion, although they were very friendly and receptive.