You could also look for a Ford 9" out of an early bronco, you would have endless possibilities with a 9".
Just for your comfort, there is a guy up here in WA who runs around in the sand dunes, he has a 2wd Yota, 3rd gen, 350 SBC, Auto Trans, and a total chaos kit, using the stock rear axle, that is welded, he has not had a problem yet and he smashes on that thing.
