yeah you will need the linkage,
http://www.ebay.com/itm/Redcat-BS903...:B:SHOP:US:101
as Imentioned im moving so ill post some pics here soon for ya.
Also for the record, if you ever think your gonna upgrade that SH.18 in the volcano DONT Even with all metal everything drivetrain wise, the .21 wreaked it hard. stripped diffs all day everyday... looked badass for 10-20ft rooster tails off all four wheels, the nothing lol