Hey guys I'm new to the small trucks of ford. I've done many swaps in older fords from 4.9's to 351w's and such. And now I have a bronco 2 with the 2.9. Well I have a chattering valve, it annoys the crap out of me. And I want it fixed. I can't seem to find any 2.9 liter heads anywhere and I heard that 4.0 ohv heads will work. Just wanting to make sure. And I also heard I can swap a 4.0 whole engine in with little modification. Any help would be appreciated. I can't even get hard on my gas without the valve getting to much stress and start missing.