Originally, I thought this was a Nissan.

http://kissthemgoodbye.net/DisneyAndNickelodeon/displayimage.php?album=325&pid=2- 52784#top_display_media

Now, I'm not so sure.

Let me try a close-up view of that sign at Wildwood State Park.

Who has a year for this Lincoln?

https://commons.wikimedia.org/wiki/File:American_Pride_Dog_and_Car_Wash,_Evansvi- lle,_WY.jpg

Looks like Lincoln Continental Mark III to me

Okay, this is for Harley experts, or motorcycle experts in general. Obviously this was customized by some aftermarket garage, so it's not a Servi-Car, but does anyone have a model name for the bike?

https://commons.wikimedia.org/wiki/File:Harley_trike_VT.jpg

Another one here. These pics are in a wooded area in Calverton, New York. All three look like Chrysler products, but the truck could be something else.

https://commons.wikimedia.org/wiki/File:Very_Old_Cars_-_panoramio.jpg

I don't know for the cars, but the pickup is indeed a Mopar product. The wheel rims are obviously a later modification, but if the rest is genuine, it's a 1950 Dodge B-2-Series: 1948-50 cab with a 1950+ Low Side bed.
Most probably a ½-ton B-2-B, as it appears to have a really short bed. Or a 1948-49 B-1-B if the bed was changed.

It's weird to see such wheel rims on an abandoned truck...

I thought that might've been a Dodge B-Series, but the grille didn't seem right. My other choices were a Wilson from Canada, or even a Powell.

Nope: it's just the way the front face of a 1948-50 B-Series looks like when the grille bars are missing
A close view of a normal front face shows these particular holes:

Oh, okay.

On another topic, can someone give me one good reason I shouldn't believe this Ford Mustang is a 1968 GT California Special?

https://commons.wikimedia.org/wiki/File:Tuned_Ford_Mustang_(Toronto_Spring_%2712_Classic_Car_Auction).JPG

Another thing, does this look like a Freightliner Cascadia to anyone else but me?

https://commons.wikimedia.org/wiki/File:CMN-Gemini-Tanker.jpg

http://www.motorstown.com/newsImages/freightliner-cascadia-2.jpg
i wouldn't knew if you didn't told the model but yep, looks really similar to me

As for the Mustang... there is always the word " tuned " in the pic's name but if it concerns only mechanical parts... no, i can't find one...

All details seem indeed to match.

Another step outside of the Wikimedia Commons. The American Truck Historical Society is having a hard time identifying many of these trucks, but honestly, most of the ones I've seen there are Whites.

https://gallery.aths.org/search?&skip=0&limit=25&album=85e9e726a6ad1b1f111abab4d- 106777b057548df&query=

Now how about something that I just submitted to this site?

http://www.imcdb.org/vehicle_1066866.html

I don't think this is a real Harley. It looks like a Japanese Harley-fighter. Which model had the big circle logo on the tank with wings and an arrow pointing down?

How about this van from Australia used to promote Lambretta scooters?

http://lambrettahistoryoz.weebly.com/new-south-wales.html

Can anyone else see the insignia on this truck?

https://commons.wikimedia.org/wiki/File:Big_Red_Truck_(14319108306).jpg

It's notably blurry.

Looks very 1950s Austin/Morris?? Local build of lots of BMC trucks out there.

No, but I can see a Giga sign on the drivers door and a CXH sticker under the windscreen on the passenger side so it should be an Isuzu Giga CXH [some numbers].

How about this fire truck next to the Ford C-Series.

https://commons.wikimedia.org/wiki/File:Summer_1980,_Easter_Seals_Camp_Merry_Hea- rt_-_panoramio.jpg

I keep thinking Hahn for some reason.