Single or Twin turbo setup for 360?

From what I can see of the picture, It looks like it’s an ‘86 to ‘90 W150. You could get a core support for a 1991 to 1993 intercooled truck to allow use of a the big Dodge Cummins diesel intercooler or an aftermarket upgrade. The intercooled core supports have additional bracing and structure built in to deal with the additional stress the intercooler adds. It does require a 1991 to 1993 grille for the later core support, though. The Cummins swap is a good idea for a 4BT in a half ton. About the same weight as a v8 and 30 mpg mileage potential. A 6Bt is only suitable for a 3/4 ton truck, and the factory engineers added additional cross braces in the frames of the Cummins trucks, so there s lot to actually doing a 6Bt swap correctly. The 4 BT could be set up with compound turbos and also responds to the same fuel pump modifications as a 6BT, so you could still have really good power for towing and such.