Clunking noise

Have you checked the balance of your tires. I work in a automotive shop and we get people coming in with the same problem you have either check the balance and check for a bent rim.
Also another thing to check if you have had your drive shaft off and put back on make sure thay it was put on so u joints are oppisite of one another not the same way. Hope this helps :D also you might want tocheck your front end gear bearings