As with most Factory Five kits there is a donor vehicle need to complete the project. For the GTM Supercar the donor car is a 1997-2004 C5 corvette. For the C5 parts needed (engine included) you can either by all new for $20K+ or buy a salvaged donor vehicle for $3-9K. If you are on a budget (like me) there is a $$ advantage to buying a salvage vehicle. As you tear down the donor you can sell all the parts you don't need and often pay for the donor and get all the parts needed for the GTM build free. For my build I purchased a 1999 C5 donor from copart (www.copart.com) with the help of a forum member I met on the factory five forum (www.ffcars.com). If you are interested in buying a salvage vehicle there are brokers that can help you buy a donor from any state as not all states let the public bid on salvage vehicles.