My car will soon be at my Indy for a service.

Given that the car has 154,000 miles, would people recommend having the steering idler arm (Pitman arm) and bush changed while the car is being serviced?

(I've already has the steering box adjusted and the shocks, thrust bushes etc replaced.)

My car isn't worth much so I don't want to needlessly pump money into it, but would be interested to hear people's opinions on getting the steering idler arm and bush replaced.

Again, given the 154,000 miles, I'm also considering having the engine and transmission mounts replaced. Do people think the engine and/or transmission mounts would give any worthwhile improvement or would it be a waste of money?

Thanks for any advice!