New to the list. Recently = purchased a '82 Diesel sunroof vanagon with the 1.6na diesel. The engine has a questionable lower end problem, so it's replacement time. I'm = looking for advice from a experienced diesel vanagon on what engine to replace it = with, (1.6na, 1.6td, 1.9na) and who to buy it from. I drive and maintain = several other VW diesels, but this is my first vanagon. TIA