you can buy a sleeved ls block for like 850 bucks on honda tech, so if you got the money, go ahead and get it. how much do you have set back for this build? to me, its lookin to be around 6k. you will not need an upgraded fuel rail, so scratch that off. for brands of turbo manifolds, there are a ton of good companies. afiturbo.com, spoolinperformance.com, peakboost, full-race.com, and a bunch more. you can keep the head stock, but i would go ahead and rebuild it when you rebuild the block. send the stock one off to laskeyracing.com and they will fully work it for about a grand (includes valvetrain and labor). oh and its called a walbro 255lph fuel pump. for tuning shops, there are a few on here and ill let them jump in. if you got any other questions, you can pm me.