Do these brackets need any prep before installation?

These ship chrome-plated and ready to install. No painting, polishing, or surface prep needed. Just unbolt the old brackets and swap these in.

Will I need additional fasteners to bolt these on?

Test-fit first to confirm your existing hardware works with the bracket holes. Most installs reuse factory bolts, but bring your fasteners to the bench before committing.

Are these correct for both short water pump and alternator at the same time?

Yes. This is a complete bracket set designed to mount both the short water pump and alternator on BBC engines simultaneously. Both are included.