just finished my w126 1st gen front brake conversion. i went and got a w126 brake booster from an 84 300sd and i love the way it feels!!! no effort to bring the car to a halt! there was a 91 300sel at the pnp as well. i was going to get the booster off that but wasn't sure what the deal was with it. it looked like 2 of the standard w123 boosters stuck together. i see that style on many w124's too. anyone know what is up with that style? and also, my original w123 master cylinder worked perfectly so one could add the larger booster too any w123 without issues. the 2 front brake lines were very easy to reach but the rear one was a bit of a hassle. no big deal though. totally worth it!

__________________
83 300CD- sanden, dual p/f condensers, 160a alternator, ect
91 300TD- 722.6, #22 head, 3.5L IP, w140 manifolds, ect