The only problem I see in the pic above is the el-cheapo bolts. The design is probably stronger than the cast knuckle anyhow.
BTW...when you put your bolts on, spend the .25 extra cents and use nylock nuts, with the nut on the bottom side. I have seen people turn the bolts upside down with the nut on the top (standard nut), and then saw that same bolt fall out as we were doing about 30 down a county road. Not cool. Result was an encounter with a shallow ditch and concrete culvert pipe. Luckily no one was hurt, damage was limited to a blown out 42 and a bent beadlock wheel.