why dont you go have it tracked up and see what happens there

obvioulsy you have fitted track rod ends but you will not get them perfect until it is tracked so it will rub id imagine

when i cossied my xr4x4 i used my stanadrd rack and just changed the hubs to cossie spec, it didnt rub after i had it tracked up

the only difference i saw between the racks was where the power steering pipes went in and one had to be bent a little bit to fit as i had to cossie pipes

other than that had no problems

id go get it tracked if it still does it then go back to the company