The ATI Super Damper is another important component in maintaining the durability of the engine. There are two ways to go here. We used The ATI-917120
damper from Summit Racing. The front of this damper is configured with a big block Chevy bolt pattern for the accessory drive pulley which ultimately caused a problem because most of the available accessory drive kits are configured for the standard Mopar bolt pattern. As shown in Part 3 of this build we made it work with a few minor modifications. If you want to maintain the standard Mopar bolt pattern you need to use the ATI-917122E
damper, also from Summit. There is also a difference in the balancer bolts for each damper. The damper we used for our steel crank required the shorter bolt ARP-245-2501,
which is 1.420 inch long. A cast Mopar crank requires the longer ARP-240-2501
which is 2.200-inch long. An easy way to remember this is that stock cast cranks take the long bolt and steel cranks take the short bolt.