Fitting a lower spring is good and as you are saying you want to fit a lowered shock is also good but the length of your strut tube will not allow the lowered shock to reach MAX travel. There is a parts shop up here in Townsville (TOP GEAR AUTO PARTS AND PERFORMANCE, 0747725288) That may be able to help. I was going to lower my 1200 ute which is fitted with 120y struts, and he offered me some lower struts off a voltswagon that fit. BUT you have to shorten your strut tube about 2 inches from memory to fit them and get most benafit from your lowered spring and shock setup. Give them a call and have a chat, he knows plenty if info for setting up a datto for racing. For the record I didnt end up lowering my ute but it good to know it can be done properly, hope this helps.