I was thinking 7/8 - 1" but that maybe overkill, i know the spindle bolts are around 7/8" so i figure the thickness of the fastener should be relavant to the plate, also Im planning on trying to use slightly larger tie rod ends (originally came with 3/4") than the CPP kit the taper length on these are .93"
http://www.napaonline.com/Search/De...92306&An=599001+101996+50014+2014076though I do not necessarily have go with these tie rods I can go a little smaller