Dash speakers for a 67 Camaro?

Can anyone recommend a good quality direct replacement speaker (pair?) for the in-dash speaker in a 67 Camaro w/ factory A/C?
Crutchfield has no information on that year. Other classic car sites
have some speakers, but no real specs so I'm guessing they aren't maybe the highest quality speakers?
I talked to a local car audio place and they said they usually make a plate to put whatever 3's or 4's in I want, but I'd prefer to replace the speaker myself with something that just drops in.
Thanks! ~tom
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file

Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.