W2 Questions

I may be picking up a set of W2 race heads P4529446 (70 cc chamber/198 cc port). They do not come with the rockers and I was wondering which rockers will work with these heads. Anyone know if these will work?

http://store.summitracing.com/partd...art=DCC-5249089&N=700+400172+115&autoview=sku

Being new to the W2 head from what I have gathered the "econo" head rockers are not the same as the "race" head rockers correct? Is the difference that the race head rockers are offset?

Thanks