needing some info guys

ok most of you know about the rx7 diff swap for the b's so we can get LSD in the trucks,but i need to narrow my axle and a hardbody axle will give me about the size i need 1" or so, not much just enough to get off the bed sides... but is there a swap for the nissan axles like there is for the mazda? i want LSD in mine, anyone know if there is...will the 300z diff work?...will the rx7 diff work in the older mazda axles as well? like the pre's?

im staying with 6lug on this truck so the ranger or toyota pickup axles are out,im down for useing maybe a fj axle(is that 6lug? cant remember) or something else that will work...thanks guys

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