Its not the tack welds that support the torsion bars, its the bolt in cross member. the cross member ties the two sides together very nicely. A nice bit of engineering on Mopars part. :burnout:MT
I agree...the tack welds are there to hold the body (just above the tunnel) to the frame (cross member). The tack welds offer little or no resistance to the torsional stresses caused by the bars. But seam welding the new (US Car Tool) transmission mount to the floor should replace some of the strength lost by removing the original tunnel cross member. I honestly don't know how much the seam weld will offset the structural loss of the cross member center section??? The problem (if there is one??) is that the new trans mount isn't on the same line (axis) with the original cross member L & R pieces so the stress along the axis of the original cross member will still try to twist the L & R pieces. I guess you have to be an engineer to calculate the stresses and how they transfer through the original cross member and through the seam welded trans mount. I guess if you could imagine a long arched bridge crossing a wide river. This bridge arches up and over the river but in the middle (halfway across the river) the bridge take a dogleg to the left then continues for a while then a dogleg to the right to get in line with the other side. It would look pretty scary but I have no idea how much load it could carry???
Still think it's a good idea, depending on price.