ive been considering doing a borg warner s475 with racing face. but decided on procharger instead. as for all the plumbing work and such. well. you could go get some ebay polished piping and go that route. i dont know if its stainless, highly doubt. so maybe paint them black for extra rust protection. ive been reading... A LOT about how to go about routing piping, how and where to get header collectors and that thing. what people do is take the stocker header, flip em. chop em up to get the flange on properly. and then since the turbo is far forward. you can make some nice turbo down pipe down where the exhaust normally went on the passanger side. as for the driver side to get the exhaust routed to the passanger, just keep the header in stock position, route the pipe to passanger header and chop it so it fits in. or. hopefully im not breaking any rules here. but www.performancetrucks.net
go there. hit search, type in turbo setup 02 silverado. few guys have already done EXACTLY what your talking about. same truck. put a cam in, rockers and a turbo and tune. torqe converter and are poundin the pavement with 10psi or so. hell i was going to go with a 96mm turbo. push a built motor to 24 psi. hehe. thats boost.