Jerry, I've already mounted the assembly with 3 points of contact. Are you suggesting a fourth? If anything, it would be a slider pad like our current International trucks have. Seems like, though, when we look at them, they are extremely worn or broken.
First picture is where I'm currently mounted with the assembly. Second picture is some support rods I'm thinking of fabricating that add triangulation to the bellhousing and trans assembly. It will triangulate more side to side than up or down, but will still give it plenty of rigidity for the up and down.