An Aerolid will be perfect. Partial grille block and partial bellypan (body edge to frame rail) also. Use block heater. Rotella T6 5W-40 and synthetics elsewhere. No open air cleaner, etc.
And highly recommend you take the time over on
Turbo Diesel Register (pay to join) for tech help.
www.cumminsforum.com is also good.
As old as that truck is expect to go through front end and all suspension plus body bushings. See
Dodge Cummins Turbo Diesel Parts and Accessories - Geno's Garage
Electrical viability a big concern, too.
.