Correct damper for Internally balanced 5.9?

So I'm having a 5.9 being built for my duster. I had Keith Black flat top pistons installed with Scat I beam rods and they went ahead and the shop went ahead and balanced the motor internally. The motor is almost ready for the dyno but I just need a damper and a few other things. From what I understand I now need a 5.2 magnum damper instead of a 5.9 since its now internally balanced right? I'm almost certain this is the one I need but just wanted to double check(link below)

Pro Products Street Dampener for Small Block Mopar

We estimate the motor is going to make around 450hp. Do you think this damper is worth it or would just a 5.2 damper work off of a truck or durango be fine? Thanks in advance