The PC89r is a 9spd chain so there should be no problems.
By "chain rub when in 8/9 gear" do you mean it's rubbing on the inner edge of the chainring? Some rubbing is to be expected as it's not the perfect chain line.
Yes,rubbing on the inner edge.I may try a 10 speed chain to try and rectify.
Yes,rubbing on the inner edge.I may try a 10 speed chain to try and rectify.