First you would want to get rid of the 8 shocks and replace them with 4 buggy shocks. (rears) Then you would want to get RPM A arms and lunsford pushrods/hingepins. A good, nice set of CVD's as well. Get a set of crimefighters and put them on. If you haven't done so already get a FOC for the tranny and save yourself a lot of headaches. IF you want a good look get a Proline crowd pleaser body and a Tekno wing kit for it. And then servos and a engine if you actually plan on racing. Oh and you WILL want aluminum bulkheads.
Now thats a set up for racing, You say you just want it to look like a stadium truck? Tehn get a body and wing....