Hoping someone can help me with sources for compressor, drier, etc for a Allegro RV (Tiffin) on a 02 W20 Workhorse Chassis with a Vortec 8100 engine. Compressor housing says Delphi 7135 and Drier says Porch 0370776. Workhorse refers it to Tiffin (RV body mfr.)... Login to read more.