This is my first post, thought i'd ask for a couple opinions. I bought a 1987 GN with 53k original miles on it for $1200.00 about 6 months ago. it had spent the last 12 years sitting under a bunch of trees collecting leaves which resulted in major rust. It is repairable, but would take a very long time and cost a fortune. My question is should I transplant the drive train into my 63 Riviera and have a very different car. please let me know your opinion, i appreciate it.