This is the 105 AC delco alternator kit upgrade.  This is for the 440 engined cars with a double belt set up on the alternator and will not mount to the later wood dash, NADA cars equipped with the 100 amp Chrysler alternator.  This will work on the 383 single groove alternator pulley cars. Please tell us what you have (single or double groove) so this doesn't become a huge project for both of us!  This kit is assuming that you have original equipment and that you have all of the original bracketing system in place or in a box!