I also suggest these...
http://www.mamotorworks.com/corvette...1-313-546.html
i bought a few several years ago when my SS had the blown motor, and it sat for over a year. I threw a set in along with putting a second set in my 85 Iroc. To re-use them after time, you "bake" them in an oven to dry them back up. Well worth it in my opinion, especially if the car will be outside.