Tundra is much wider like 67 or 68 inches. Its plenty strong. Not sure about perch width, just move em if you need to. What is your drive train?
I wouldn't say a toyota pickup/4 runner axle is the strongest, but there are plenty of fools with HiPo V8s, autos and 35s on stock toyota axles, the bearings usually go due to load before anything else.
Chris
