vibration
 

my 83' 300D has 250,000 miles on it. it still starts great and runs great. when driving on the highway i get vibration through the entire car between 70 and 85 mph. none above or below. also pulls slightly to the right. tires are toyo ultra's bought just over a year ago. what can i do to correct this.

I'd get your tires re-balance, dynamically, with weights put on the inside and outside lip of the car.

Find a shop with with a Hunter GSP 9700 machine. If you ask for that machine, they'll know what you're talking about.