simple question on the intermitant "ticking".... is it louder when next to a building or guard rail or something like that? if it is i could just be a small exhaust leak that you are hearing bounce or reverb off of the wall. just a thought. if it is a engine "knock" it should match speed with the rpm's and you should still here it on hard accelerations. the exhaust leak ticking disappears under higher rpm's. hope this helps.
tim.
p.s.
Guilty2 where are the pics of your new rims??????