Silverado Z71 10" Lift COMPLETE 6.0/4L80E PRC 2.5 Ported LS6 Heads 228r Comp Cam 3200 CIRCLE D Stall LS7 Lifters ARP Bolts SLP Oil Pump and Double Timing Chain 160 T-Stat 3" SLP Loudmouth Electric Cutout Walbro 255 Pacesetter Longtubes MSD Starter NELSON Harmess NELSON Street/Strip Tuned ECM MSD Wires LS1 Throttle Body Braided Lines Spectre CAI 4.56 Gears Detroit Locker 14 bolt http://www.ls1truck.com/forums/lsx-t...wap-build.html
so the crank from the 04 6.0 will swap in 99 6.0 just fine i wont have to change the reluctor ring i would go with a 4l80 but just had my 4l60 rebuilt has about 10000 miles on it and im on a tight budget but i have a complete 99 6.0 and bought a 2004 6.0 for the heads and found out the crank in the 99 would be to long for my trans.