Hi,
You may want to give the guy's at Campbell Auto Restoration a call. They are located in the south bay in Campbell Calif. There number is (408) 371-5522, They are not normally open on the weekends but if you try after say 9:30 someone just might pickup the phone. They are experts in the automotive restoration business and certainly know thier stuff when it comes to first, second, third and fourth gens. With any first gen car, especially a convertable, you deffinetly want to get it checked out for rust. Ask for Tom or Mark.
Good Luck!
Jon68z