I was looking at different sprints for sale on RJ and noticed some referencing things like 86/40, what is that? My questions are mainly about wingless. Are all sprints torsion front and rear or do some run coilovers? I saw somewhere that the cars react too quickly on coils so most run torsion. Lastly who are the best non-wing builders for dirt? I know of DRC and Maxim and Bullitt I believe. Not sure if Beast makes a non-wing dirt.