Are these the correct Packard connectors for the bulkhead connector?

Not sure if our vehicles used any of the other Packard connectors (58, 59) but something to keep an eye out for.

AMC (Jeep) used them as well. Some good info and links on these pages.
Near the bottom this page has a bunch of links; Mostly to the repair connector store.
BASIC WIRING 101, Getting You Started! - JeepForum.com

Descriptions of Automotive Connectors on this restorer's page and more links.
Automotive Electrical Connectors

Del City is another on-line source without the minimum quantities that Waytech Wire has.

There does seem to be some difference in materials from different sources. Some have shiny brass, others are steel or tin plated. Unfortunately with mail order its hard to tell what a gray looking terminal is made of.