I would do
1} Amendment to ban discrimination based on race so we can finely repeal the civil rights act.
1} I'm not sure what you mean. The last clause in Section 1 of the 14th Amendment is the Equal Protection Clause, which has always been interpreted, correctly, as a ban on racial discrimination by state governments. Do you want to adopt an amendment that bans racial discrimination by private enterprise the way the Civil Rights Act does?
As you point out, the Civil Rights Act of 1964 depends not upon the 14th Amendment but upon the Commerce Clause for its Constitutional basis. I'd guess he wants that placed on a different footing so that the Commerce Clause might be gutted (or reined in depending on your POV.)
Yes mark right now I honestly think the civil rights act is unconstitutional so it needs to be put into the constitution.
Also yes convention of states is great I hope to see it done one day.