"Based on the amount of caked on grease, it looks like the parts are either original equipment or very old."
so you're pushing a 55 year old truck to 70 without a complete front end evaluation and refurbishment? did you bend the tie rod jacking the truck? have you had an alignment? wheel balance? checked the front wheel bearings? what condition are the front brakes in, ever open them up? how old are the tires? did you get all those U-joint needles back in?
Bill
