If you need to rebuild the shocks because of a bent shaft I wouldn't bother. Look at getting better shocks cause the big bores from hpi are very underwhelming.
@rc4me.US has an awesome set of big bore shocks for the savage that work really well, and they much much stronger than the big bore shocks. They ahve thicker shafts which are less likely to bend. I've been running them for a while now in my rig and after many crashes they're still going strong.