Thanks for that. From what I hear you beat the piss out of your car so that's good to know that set up worked for you. Looking around I found this also. A comparison Enjuku did between BC valve springs and Ferrea Dual valve springs. The BC vavle springs were damn near identical to the Ferrea duals.
http://enjukuracing.com/brian-....html
I guess I'll be saving $135!