LS 6.0/4l80e swap - What tcase and fuel system ?

[Kcorey]

Hello all. I have a 1970 k20 cheyenne i am wanting to swap a 6.0 LS and 4L80E transmission into. Couple questions , what transfercase have all used to retain the 4wd i know i am going to have to have driveshafts made? Also i am planning on using a pacific fab engine crossmember, what transmission xmember have others used? My truck has a aux tank from the factory, what have you guys done to supply the engine with fuel while using the factory tanks? Thanks