I have a 64-66 Buick 401 Nailhead engine without a harmonic balancer. So I need to buy one. Does anybody know if a harmonic balancer from a 425 will work on a 401? Does anybody have suggestions where to buy one?
BHJ has them... http://www.bhjdynamics.com/index.php?main_page=product_info&cPath=1_3_33&products_id=183 and I think you're better off with a new or rebuilt one than a take off.
check out the damper doctor online. it lists 401 and 425 as the same pn. BUI401 $425 outright and your core is worth $200 so $225 exchange. contact # 530 246 2984 redding ca.