I'm looking to buy a new ATI harmonic damper for an engine I am putting together. It is a 496 cube motor that I hope to get about 750hp/7000rpm out of. For my past 2 engines, I have used the ATI part# 918310, which is a steel outer and inner damper. However, I just noticed ATI make a FE damper with an alloy outer shell and steel inner, which is actually cheaper than the steel/steel damper. Any disadvantage to using the alloy/steel damper for my application?