Hey everyone I have a 1994 F150 4.9 ltr manual with a 4 inch lift and 35" tires. I've known for a long time now about a noise that's been coming from what sounds like somewhere in the front half of the truck while driving. When I'm driving about above 40 mph at higher rpm's, or when I take off fast from a stop I hear a strange thudding noise that's pretty loud. It isn't a constant thud either, it can be slow or fast depending on the condition of the road and the rpm's. And I can also feel it below my feet. It implies to me that somethings loose somewhere or something like that. I checked all of my drop brackets and nothing is loose or broken there, could a bad engine mount do this? Any help appreciated