I definately have the lower box in the pic with the bent up lower arm. I just saw on eckler's catalog they sell the front motor mount bird legs with a shorter stud but wouldn't that throw the geometry off?. I pulled the studs out of the '58 at the scrap yard and they were the exact same length as the ones the 6 cylinder had. My assembly manual shows a short stud like eckler's sells. Maybe that's my problem? It looks like you do have the 2 1/4 long one on yours though. I don't get it. I bent my shift arms a bit to make it work but don't have a decent set of manifolds. I bought aftermarket ones and they are much wider since they have 2 1/2 ports and they still hit.