Both truck arms and Henery's axles have fairly low torsial ridigity.... ie they twist. This is what allows split wishbones and the solid rear axle to work. Every time I see a tube axle, front or rear, with split bones, hairpins, or boxed truck arms I cringe. It's a mess waiting to happen. On a fairly flat surface, salt flats for instance, it would likely be OK but any substantial cross articulation will result in very high stresses, such as pulling into a driveway.