I got a really clean 76 C-20 with a tired small block and a th-350 auto. I have been thinking that it would be nice to have a diesel in it but I wan't to keep an automatic in it even if it means upgrading to a diffrent tranny. I know the easy swap would be a 6.2 but I would like to hear what other kinds of diesels could be used for a conversion. I'm open to all suggestions. BTW nothing aginst 6.2's it's an option as well.