904 misbehavin'

The 2 bbl rod is indeed shorter than the 4 bbl rod. If you have a 2 bbl rod, you probably won't be able to adjust it far enough.

I went through this when converting my car to 4 bbl. I think this post will help you.

http://www.forabodiesonly.com/mopar/showthread.php?p=1969613512#post1969613512