Sorry for the delay, haven't been on this board in a few weeks. Chassis was built 20 years ago. It's a Revell ASA chassis with some slight modifications. The body is scratchbuilt from evergreen sheet. Wheels and hubs are resin cast items for a guy that did them 20 years ago. Decals are custom printed from a guy I know on a FB modeling site. Pretty much all of this stuff is still readily available. Here is a link to a FB sight where you'll see quite few dirt late models. https://www.facebook.com/groups/WFCMotorsportsLLC.
roncoon.com has a ton of resin parts and bodies