I have no reason to doubt you, Tom.
DSS Main Support & ARP main studs = $331 +shipping
ARP main studs + Windage tray = $260 +shipping (roughly)
Seeing as I still have a new flywheel, clutch, electric water pump, oil pump, k-member, LT headers, head studs, and all the gaskets to purchase before I can have the new longblock assembled & installed, I think I'll stick with the studs and tray for $260.
I was thinking it was unlikely that the 03-04 Cobra guys pushing 700 HP werent' opening up their bottom-end just to bolt one of these on...