I was working on my 66 the other day, and decided, to scrape off original seam sealer, and re-seal it I was impressed with the red primer, under the sealer.. Your comment on the 69 just needing floors, reminded me of my appreciation, of the floor in my 42 year old Toronto car!! lol
now those are nice floors! better than the hack job the prevous owner did on mine, and i dont want to talk about the trunk!! Thick metal for the floor though and it will never see rain or winter so im not too concerned.