dra93n
+1y
That measurement sounds like offset dude, +42mm would be from the point of center of rim, which means the back space is 107.5mm on a 7.5" rim, which will tuck under any toyota. So Dragnbdy, you wont need to touch your axle dude!
yotadrgnbdy, you'll need about the same back space dude for 7" rims, this will keep them in a bit from the front guards as not to rub on low driveing.
I have measured up for my billets, and have done a few of my mates rides and all turned out well.
Hope I helped.....