A/C condenser and dust boot?

[71CHEVYSHORTBED402]

As much as I'd like to (not really) pull the radiator off my driver to see the condenser hardware, I probably won't...............Reading page 515 of the assembly manual, it looks like they're using shims at the bottom. At a glance, and by positioning the condenser on the truck I am working on, the surface of the holes in the core support are flush or mostly, so why shims? If shims were used, and I suppose they were, does anyone know the depth?

Also, someone gave me "the hardware" to mount the condenser. Two hex head tapered bolts with flare washers........and two hex flare head bolts, washers and nuts. Sure they'll work, but does anyone happen to know what hardware was used from factory?

And finally, dust boot at the connection between the drier tube and lower condenser huh? Neat.

See pics. Thank you.