Ok so I'm wanting to design a forum based website for a particular vehicle. This vehicle is the 4th generation of it's platform. The platform is called F-Body which is the platform for Camaro's and Firebirds since they were created up until the 2010 Camaro. Some info: http://en.wikipedia.org/wiki/GM_F_platform

Anyways I have 4thfbody.com/ and 4thf-body.com as they are entirely similar. One key note for each is one is easier to type into a URL without the "hyphen" and the other actually includes the correct way to write the platform. Which one should I go with or do something completely different?

Something like:
gen4fbody.com or gen4f-body.com
fbodygen4.com or f-bodygen4.com
fbody4.com or f-body4.com
Suggestions? Ideas? Thanks for any help!

I'd use the one without the hyphen (easier to type is better) and forward the other one(s) to it.

I would also go for domain names without a hyphen or any punctuations. The first domain ideas are better than the second ones.

fbody4.com

I suppose that is the best one among mentored domain names

4thfbody.com is good