Ok guys and gals I need help. I have a 91 f-350 supper duty 16ft car carrier with a 460. I am more of a chevy guy then a ford guy but they do make one hell of a work truck this one has 220,000 miles and has not given me any trouble to now. It has come to my attention that the timing chain needs to be replaced. Has anyone done this? What I am asking is do you have to drop the oil pan like you have to do on a chevy if this is the case I might just farm it out. Thanks for any help.