If your not going for performance and you just want to drive it either rubber or poly bushings. Poly are much easier to install. If it were a 73 and later B body I would scream get poly but an E-body doesn't have an isolated K-Frame so either one is fine.
Moog can be had many places. I bought some at O-Reilly's but have even bout some Autozone Duralast parts with Moog tags in the bag with the ball joints. Check with the counter guy at a Carquest/Napa/O'Reilly's type store.
Before you settle on a PST Kit check prices for components locally and mail order including shipping & Tax. Often with mail order you will find that after taxes and shipping you could buy it locally and be ahead. Wise shoppers prosper.
Can't help you on the Bilstiens.
there is a parts wanted section here on moparts that may help you fond the carb you want.
Hope it helps