I have the following rebuildable original Delco alternator cores - all are 55 AMP alts (stamped) 1100774 6J20 date code 100774 7H29 date code 1100774 8D23 date code I also have a complete '71 big Buick alt - 1100931 55A 1D20 date - again, a core but can rebuild/restore. May or may not have pulleys and/or fans on them but I may have some...will check if someone has SERIOUS interest in any of these. Prices start at $40+shipping for a bare core (ie - main alternator with internals, etc - with "unstamped" double row pulley and NO fan). Can rebuild/restore (to show quality) here which will be additional and depend on how complete you want the alt. All cases will be nice - not pitted/corroded or cracked, etc. Post interest HERE and PM w/questions. I'll post or send pics if there is interest in any particular alt.