[AMC-List] Date: Sunday, January 14, 2007 01:21 PM From: Jim Boone <fljab@xxxxxxxxxxx> Attachments: <http://www.amxfiles.com/archive/attachments/114253/1518>1518 (184 bytes) I have 2 complete sets of pulleys (to support AC) for a 4 bolt balancer. My '70 390 is a 3 bolt. Can a 4 bolt balancer be physically put in place of the 3 bolt balancer? If the physical mounting surface is the same, then that should work, balancing issues aside. The balancing could be dealt with during rebuild. Any other options? I have had no luck finding a 3 groove, 3 bolt lower pulley. From talking to different people, I'm not sure they made them. Was AC driven off another accessory, like the alternator or water pump, up through 1970? Thanks, Jim Boone Jim, Etal; on the AMC-list Doug Noel at American Parts Deport has new 3 and 4 bolt balancers. I just bought one off Doug in September. The price is not too bad. Check out Doug on-line catalog at : http:\\www.americanpartsdeport.com . But beware you need a high speed connection the catalog is big even just for that section. If the price is too high for you an outfit called "Damper Doctor" does rebuilds for about $5 or $10 more then Doug's new ones. When you building an engine the part you try and go cheap on , is the one that comes around and bites you. I'm building a 69 -390 V-8 for my 1969 AMX and doing a write up on the engine rebuild along with the redo of the entire car for the NAMDRA newsletter. thanks , Larry R. Daum _______________________________________________ AMC-List mailing list AMC-List@xxxxxxxxxxxx http://www.amc-list.com/mailman/listinfo/amc-list or go to http://www.amc-list.com