Researching Vortec Triton V10 8.1L on a 22-Series Workhorse

I believe that the Workhorse W chassis first came out in 2003. The 2001-2002 models were on the P chassis and had the GM 8100 Vortec 8.1L engine with the GM transmission The 2003 and newer W chassis models had the 8.1L engines with the Allison transmissions.
Some manufacturers, like Winnebago and Monaco, offered the identical floor plans on either a Workhorse OR Ford chassis. Only the Ford chassis models had the Triton V-10 engine. All Workhorse models had the 8.1L GM V-8 engines.