I traded my 2003 C70 convert. last month for a 2008 C70 6speed. Man....what a wonderful car.
I installed a hitch on my 2003 to haul my wave runner or motorcycles.
I made a request here about a 2008 hitch and got no replys. I "googled" about 2008 hitch and there where just none listed for a 2008...... BUT ....Ebay has listings for a 2011 . I purchased a 2011 and it fit just fine. Took less than a hour doing it myself.
The car requires a trailer light mod. kit and I installed all but the lead wire to the battery. I will got to that soon.

Cb