Good move as you can see from my avatar i have a 1980 Malibu, back halfed 4 link car certified to 8.50, it's ever bit as clean as my 79 Elky inside and out, neither one has ever seen an inch of rust. I once towed my Malibu too the track with my Elky, you wouldn't believe the eyes that they caught on the freeway.
Good luck on your project and they are well worth the effort.
Zip.