wheel spacers are dumb. it fags off your pivot point of the tire when you turn, you get a dragging motion to your turning. my buddy ran 3" wheel spacers in the front, and no it didnt do any damage to trunions or steering studs but it didnt "add" a whole lot of width either. Not like my d44/t100 combo. He ended up taking them off cause of performence.
If you want width dont do a cheesy ass wheel spacer. do it right. either swap axles or widen your toy axle. a t100 rear is 66 3/4" wms to wms. a stock toyota front is 55"... even with adding 6 inches of wheel spacers your at 62" maybe 63"
i just dont see adding 6" of aluminum to your axle. I mean I guess if you want just a
little more width but you had 1 1/2 already so you are only adding 3" all together....