narrowing rearend on a 91 maz with 22X10 wheels

just wondering how much i am gonna have to narrow my rearend on my 91 mazda for 22x10 wheels....

5 inches a side for a 10 same as the dib hardbady . i also have a 64 datsun rear end 6 lug bolt pattern thats like 46 inches side to side would be about the same as narrowing one thats in great shape for 150 if that helps also

depens on the offset and backspacing of the wheels

i narrowed my stock 6 lug axel 4 1/4 inchs on each side. its to allow for a 24x10 with a 13mm offset.

josh