Which flywheel setup??
1. 98 flywheel dual pattern, Hughes torque convertor adaptor, and machined torque convertor shims, Arp convertor bolts
2. 2003 flywheel from a 6.0 with a 4L80, GM crank spacer + Longer Crankshaft bolts, Arp convertor bolts
1. 98 flywheel dual pattern, Hughes torque convertor adaptor, and machined torque convertor shims, Arp convertor bolts
2. 2003 flywheel from a 6.0 with a 4L80, GM crank spacer + Longer Crankshaft bolts, Arp convertor bolts
Try this in the tranny section and I think you will find your answer
They have done more of these swaps than the guys here prolly. 

