> Removed the wheel
> cylinders and am contemplating a new rebuild kit, though the
> pistons are tight
> and cannot be removed by hand. Is this an indication they are fine?
No, I would say that's an indication they need attention.
> marking on the cylinders are "Girling 64673305", "BS12" on one,
> "BS9" on the other.
> Any advice on the bore size, based on these markings? Rough
> measure seems to
> be .75". These are slotted piston ends.
I can't identify the numbers, but original would be either .75" or .625" ...
should be easy to tell the difference.
> I also found that the dust covers are missing on both wheels aas
> are the felt
> bushings for the steady posts too. Are these really required?
Not essential, no. The dust covers frequently rot & fall off, they just
help keep dirt & stuff out.
The felts are just to hold lubrication, the shoes rub on those posts every
time you apply the brakes.
> From the looks of it these seem to be early 10"ers, which would
> apparently go
> with the approximate commission /engine/EB numbers of 38,450 ... or so.
Actually, those numbers would match the last revision of the 10" rear
brakes, with the (NLS ?) .625" cylinders.