65 valiant tail light gaskets?

holy cow batman and rubber robber..thats some cheese...Ok so if i decide to just get the gaskets for backuplights and brake lenses without the body to housing gaskets is this bad idiea with moisture and all?I want to put in my new lenses mine are waisted ,completely done,i have new old in great condition just want them in...just thought getting the body to housing gaskets would be smart but$ 89 is out of my price range for this month..so maybe next month...lol thanks 65 valiant..i am still looking though...