Not a whole lot to contribute, but I'll at least add something..
A FPR should do the trick, rumour has it that they were running lean on a 2000 with a header back brullen system.. then Shiv was misquoted as saying the stock injectors can only hold 170hp..
I would think that if you maxed out everything.. cam, heads, headers, exhaust, intake.. etc.. you may need some more fuel pressure..
It wouldn't be much, and the guys at COBB tuning may be able to give a yay or nay, but I would think a RRFPR or just an FPR would do it.
..oh and a bit of a bump too..