This is a pure sound video so you can hear the beautiful sound of the 6.5, maybe with some chatting in the cab
This is a K3500 1998 with a 6.5 Detroit Diesel and a manual swap to a NV4500, plus an upgraded cooling system, and computer mods. 5 inch skyjacker lift, 4 inch turbo back with a 5 inch Y pipe to 8 inch stacks.

The load was a tow truck, 1991 F Super Duty (the first version of an F450), load and trailer were around 13,000lbs. May not sound like much, but this truck was only rated for 7,500lbs towing when new. Making the truck weight was over 20,000 gross. The 6.5 was never meant for this kind of load, if you had a 454 Big Block, then your rating would be 10,000lbs towing