stay away from the piggybacks they tend to leak.i run stock shocks with rcraven springs with 40 wt oil in them and i bash hard.the flux diffs are a good idea as they will withstand gobs of power.i upgraded all the bulkhead and tranny plastics to savage x on my daughters savage project just for ease of maintenance.also the x roll bar with engine cage is a good idea you can find them on ebay for a couple of bux