One point of consideration regarding the voting of the back and front: I like # 5 and # 4. #5 has the website on it, #4 does not. If #4 ends up being the winner, then I would prefer choice #1 for the front that has the website, if number 5 then I think # 2 for the front.
I think it is important to have the website featured at least once on the shirt.
Another option: how about option # 4 with "primary research and resto...." on the top, and then the CRG logo, and the then the Camaros.org script on the bottom?