I would highly advise against setting up a few dummy accounts, as it's not worth your time. Any site/forum with that many members is bound to have code and procedure in place for detecting duplicate accounts, and they are specifically prohibited in their terms of service anyway. I know the guy that runs the forums at Allpar. He's been running online forums for 10 years. He doesn't put up with much, but he tries to be as fair and impartial as possible. As do most of the volunteer staff over there. But they do have a set of rules to follow, and will act on them as the situation requires.
What you folks need to do here is concentrate on trying to make this a true and valid resource for the K-Cars. It was because of the folks and the goodwill at Allpar that this place got started, now it's your time to try and take it to the next level. "Stealing" members from Allpar isn't the way to do it, as that will only serve to drive the wedge even deeper.
You have a forum here...and that's it. You need to work on offering more to your current and potential future users. Consider this: go to Google. Type "chrysler k-car" and search. This site is the NUMBER TWO link that pops up. Wikipedia is #1. Allpar is number 3, after "image results" and "video results." So you already have an edge there. But since there is only a forum and no other resources, folks have no reason to stay. You need to give them a reason.
Take the "anti-Allpar" effort and put it towards making this place worth coming to. The end result will be much more rewarding.