I think 2.78 is great for highway/open country work. Really anywhere but the drags. I wonder why they are regarded as noisy? Is it inherent in the gear match?

Other options for you Blocker would be 3.08, 3.36, 3.55, and the 3.08 still suited to highway style and more readily available for sale in ute/panelvan housing than 2.78.