Hi Firehound
The swap of a complete 6.5 will bring up a couple of issues with the down pipe off the turbo.The 6.5 system was designed for the frames of the newer trucks,1988/2000.There have been a few swaps and the down pipe interfers with the heater box in the engin bay.It becomes worse if you have and want to keep your AC.The frame of your Sub is also in the way.I have read that some people will turn the down pipe to the outside of the frame to get around some of the issues.
Thomas
90 Chev 3500 c/c 4x4,6.2na,400 auto,4:10 gears.DSG Timing gears,main girdle, isspro tach, pyro,boost,oil and trany temp.Dual Tstats, High volume peninsular pump,on shelf, Custom turbo and intercooler 85%complete. Change of plans for the dually, it's going to get a Cummins. Both trucks are Blue 90 4x4 crews