I know this is an old thread, but here's a fairly recent one:
http://www.imcdb.org/vehicle.php?id=736333

I think there's already a post for that. Of course I saw a Ford misidentified as a Chevy fairly recently.

You could also simply post in the thread about vehicles that had to be renamed, no need to dig the one specific for Ford

I thought I was going to have to have a long search for this thread after 507 days, but I found it. Now, here's a '62 Chevy C-Series that was mistaken for a '61 Ford F-100 somehow:
http://www.imcdb.org/vehicle.php?id=372097

Here's another one:
http://www.imcdb.org/vehicle.php?id=305864

I've listed this as a GM C/K-Series for now.

Did anyone check this GM out yet?:
http://www.imcdb.org/vehicle_40733-Ford-F-Series.html

The original picture was different and I could see how that might be mistaken for a Ford at first glance, from that angle. I can tell it's a Chevy but I could see someone else making a mistake with that pic. The pic that is there now is very obviously a Chevy.

For whatever reason, a lot of people are mistaking this truck for a Ford too. It doesn't even look like one.
http://www.imcdb.org/vehicle_232193-Ford-F-Series-1961.html

Here's another. It's actually a GMC Steel-Tilt Cab truck misidentified as a Ford C-Series:
http://imcdb.org/vehicle.php?id=213010