Motor is stock stroke 440. That may change though.View attachment 347033 how big is your motor? if your motor is 500 " or more, inertia weight is important. i would really talk to your engine builder and get his input . i don't like the fact that you cant service (rebuild) the unit your self . ATI is the way to go. they have many option for our mopars. there race proven check out there website http://www.atiracing.com/products/dampers/charts/damchrysler.htm
Not a lot of info on their site. Ill have to give them a call.even on there website don't say if you can use it with a gear drive,at least ati,you can get it anyway you want
If I were just replacing the damper, I would use the ATI.My last 4 hemi's all have ATI units on them. I've used steel hub/aluminum shell/chevy bolt pattern... for them.