Big reason for running aluminum rods is to NOT beat the bearings out when running Nitrous or blown applications..the aluminum rods cushion the impact on bearings...it is also suggested that aluminum rods be changed out around 50 passes no more than 75/100 passes.
If I were you I would run a good steel rod in natural aspirated motor.. Much longer life !
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Bjuice..
"I'M YOUR HUCKLEBERRY ! "