Strokin, please provide more info on "upgraded housing". Where they can be bought, approximate cost, etc. Our trucks appear to be somewhat similar other than year, 1989 F-350 4x4 7.3 Turbo IDI ZF 5Speed 4:10 gears reg cab long bed SRW XLT Lariat 315/75-16 BFG All Terrains On Alum Wheels (stainless centers) ATS 093 3" Outlet to 4" Stainless Diamond Eye. BB Code Injectors, SM Fly Wheel 301,000 miles.