[donl1]

just started rebuilding my 67 gto 400 auto , had engine rebuilt and now my pulley will not fit my new harmonic balancer which is a one piece 4 hole balancer which is for a 68 from what im told . i contacted a pontiac guy who sent me a nos balancer which my pulley does not fit either so he is sending me a pulley for that harmonic he sold me saying it is for a 67 . my question is if my engine was broke in on a dino with a 68 harmonic balancer is there any difference other than the pulley set up between the two please help!!!!!