I built this over about 5yrs, you've possibly got the Gravel Express carrier as it went east when I sold it in 2012 then was written off in a hail storm, if you want pics/details contact me on FB Tom Haeld, cant remember how to post pics here but if you go through my past posts ( pimpreza, not Pimpreza1 )there should be a full build of it on here.
https://www.youtube.com/watch?v=OHK5Ev7BLLI