1967 Buick Skylark convertible

Greetings from "Big Sky Country". I'm interested in purchasing a local 1967 Skylark convertible and I'll be checking it out this weekend. As a "Buick newbie", are there are any particular things I should look out for? Any problems with this particular model/year? Any "pearls" would be greatly appreciated. TIA.

Scott Ross
Billings, MT