64-65 Skylark brake/clutch pedal assembly.

[texasekberg]

working on converting my -65 SportWagon to 4 speed and trying to find as much original parts for such set up.

[TrunkMonkey]

I did a conversion to manual in the late 70s on my '64 Special using an Olds '66 f-85 for parts.
All the manual components fit perfectly

I also used the 330 from the Olds, so the z-bar width might be an issue if the Buick and Olds engines differ in that regard.
But pedals are a direct "drop in" fit.

So, 64-72 Olds a-body parts should also be a source.