The Ubolts I used for this initial mock up are two 3 1/4" ubolts on the 9" plate. A 4" and a 3 1/2" plate were used on the drivers side. Seeing how the tolerance is much tighter with the 3 1/4" (obviously) I'll probably get another 3 1/4" bolt made for the drivers side. Trick of the trade: to get your Ubolt to expand (make it bigger at the threads), hold one side of the bolt and slam down the rounded portion on a piece of steel. It works!
