what bushing?

im tryin to get the front upper and lower control arm bushings but everybody wants to play stupid so if someone could explain why there are two different size bushing kits it would be appreciated

The upper and lower bushings are defintely different, but I only know of one "set" size. I would call PST and ask them for sizes. You don't have to buy the polyurethane ones, but they'll know the proper diameter. http://www.performancesuspension.com/controlarm.html

If I remember right, the lower A-arm for the 73 model year had a bushing size that was different than the rest of the years. Even at that, some 73's had the same size as the rest. So it is easier for suppliers to just provide both sizes for the lower A-arm and let you figure out which one you have.

Yeah my 73 also needed the bigger ones. Also 454 equipped

we just guessed and ordered a kit, guess we got it right.

did not hydro order the 72 set and 73 make it work ?

Just dug out the parts list from the kit I ordered from energy suspension.

Seems the only difference is at the lower front A-arm bushing. Some had 1-5/8" shells and some had 1-3/8" . They just put both sizes in the kit to cover whatever you have.

BTW the kit I ordered is labeled for a 74-77 Buick Century set #3-18111

i just did my suspension last weekend and although i didnt measure and i forgot what size they were when they were ordered, i believe they were the 1 5/8", i will tell you that that those energy bushing and some KYB gas adjust shocks make a HUGE difference in how nice the car rides, i highly recommend it.