So are you looking to basically max out the TD04's then? You'd be lucky to get 550-560 whp with them, and even then the boost levels required to make 280 whp per TD04 create a LOT of heat thanks to inefficiency at that psi (18-19 psi). Make sure the cooling system is appropriately modified and the intercooler is massive...you'll need it!
I think the turbos will be holding you back big-time, at least compared to the rest of the buildup. No reason doing much in the way of cams and headwork IMO, the turbos won't breathe well at higher rpms anyway. Now maybe a pair of GT28RS's or GT2871's....
