My 73 b1600 has a rebuilt 2.0 with a weber carb and a flow master exhaust, and it runs fantastic. The motor and 5 speed tranny are from a 79. I'm going to add a header soon.
Hope you are knocking on wood when your saying that. I have seen countless 2.0s that have blown headgaskets. I've blown 3 myself. trplzro has had quite a few parts trucks with them.
Sweet looking Courier!!! I have always liked those trucks with the exterior tie downs!! Good luck with you project and let us know how you are doing via pictures.