Thanks all for the help first off.
Just picked up a clean barn find 2500HD.
it is a 6.0 Auto 4l80e
4x4 Z85
4.10 gears and a G80 Differential
With a fifth wheel hitch.... Max I can tow. I mean MAX. I will need to move a 12,000lb fifth wheel a few hundred miles 2 times a year no real climbing, flat and steady.
Any upgrades I can do to make this safer. Or Better.
Thanks