I'm looking into replacing my stock 140K mile harmonic balancer and popular opinion seems to be split between the Powerbond/Pioneer unit and the Romac. I was able to find part #'s for the Powerbond/Pioneer units - 872030 (SFI) and DA3021 (non-SFI), but does anyone know the part number for the Romac unit? And does Romac only make SFI balancers? My motor is basically stock for now but I plan on adding an A-trim (to start) in the future and I only want to do this once. Even with the blower I don't see the motor turning past 6000 rpms. Will I need an SFI balancer if I get blown? Is it my imagination or are the majority of the balancer posts from guys with 94-95 cars? Why would they go through balancers more than the 87-93 cars?