Water Leaking In The Trunk!

Okay, I taped all around the back glass of my 1973 Dart Custom (vinyl top) and the water leaking has nearly completely stopped. I think the back glass needs to be pulled and resealed? I think the weather strip around the deck lid needs replaced also, as it is flat as a pancake and may not be making a complete seal when the deck lid is closed. Here is my concern with pulling the back glass for a seal job; what if there is some major issues with rust up under the glass flange? I really do not want to get into any major body repair on the car, I bought it to drive it not restore it. Maybe the answer is buy a quality cover and just drive her on dry days? Thanks in advance for you input!

Mike
What did you end up doing? On my car water gets under the vinyl, but I don't think it leaks into the trunk (yet).