Idler arm bushings on 55

Went out to replace the idler arm bushings and wanted to check on something before driving the new ones home.

First, as you can see, the rear bushing has a grease nipple. This is a power brake car. I was under the impression greased bushings were only on manual brake cars??

Next, the height of the new bushing is quite a bit more than the old bushing AND the bore into which it goes. Is this typical and not an issue? This IS the shorter of the two bushings.

You can see the old versus new in one of the photos below.

An update. I removed the bracket (AH-3351A) to facilitate easier removal/replacement of the higher of the two bushings but this looks pretty different from the new bushing AND to any example I can find online. The bushing in there right now is SOLID and will not drive out. My guess, it will come it with a machine press or with the application of heat but more to the point the outside diameter appears slightly larger than that of the new bushing.

Can anyone help here. I am guessing someone installed non standard bushings. Also, this old bushing had MULTIPLE washers/roller bearins above/below it. Doesn't look standard from what I can see.