So my 73’ duster just happens to sport the big bolt pattern 8.25 rearend. Now I plan to upgrade the engine to most likely a big block with a torque factor of ‘ridiculous’. These are not 8 3/4-Dana 50 rears, so I’m sure their power-to-survival rate is much lower. So my question is, how much power can it take in stock form, and how much can it take with an upgraded truetrac center section and aftermarket axles with an aluminum diff cover?