Tires wearing on outside

[vince1]

Well learned people I need some advice.

It's been a few years since I've got this old farm truck back on the road. Front end wise I changed it to power steering which means the pitman arm was changed and as I remember I also changed the lower ball joints (which didn't need to be changed). The link between pitman arm and idler arm seems to be running true so to speak with about 1/8" to 3/16" clearance to the cross member.

I recently noticed that the front tires are wearing more on the outside. Putting a square piece of plywood up to the wheels on flat pavement does not indicate that the wheels (camber?) are splayed out at the top. Top shim stacks are roughly 1/4" thick. Sighting down the wheels from the front to the back does indicate excessive tow in.

My question is, can too much toe in cause tires to wear more on the outside?