L59 Injector options?
Rob
Your rail is going to be either LS1 or LS2 style for those years. There are a TON of options. Just need to find some EV1 60's injectors. At worst you'll have to run a 1/2" spacer on the rail and different o-rings.
Unless you already have the s480 I'd go a little smaller with a 5.3L and a goal of 600. the 480 is a pretty beast turbo(read laggy on smaller motors). Maybe closer to the 72-76mm range rather than 80/88. The low side of the compressor map for that turbo is about 750bhp.

