Two problems 1 spark plug has blown out twice from cyl #3 and 2 brakes are grabing and making the truck shake bad. Any suggestions on how to fix the spark plug problem or any after market heads to replace the stock ones. I have heard that there is not enough tread on the heads so the plug comes lose.

 

You can fix the head. Do a search on timesert. There's another thread going on the cost of a brake job that has a link to stoptech https://www.f150online.com/forums/sh...d.php?t=236860. Good reading about brake issues.