I thought it was an A body, but have never heard for sure. I am relatively new to this forum, but i am learning helpful new things everyday from everyone's posts. Thanks, Baker. Go 4dr. baby!
That doesn't mean a lot though till you get into the 70's since GM didn't standardized platforms till 71 on the big cars. You will need Buick B-body stuff for the most part since the same basic design is common to them all but the details are generally Buick only.