Not to be selfish, but what did you find? I'm down the 80 series desmog rabbit hole at the moment. If you feel this is still a viable option, I may have to pull the trigger on this project for my truck.
Could this be an option? I have contemplated this, just haven't pulled the trigger. More air at high altitude where I live makes this pretty interesting. Maybe old parts as well, but options are what old rigs are all about sometimes. Best of luck.
7mge VAFM swap for the 3vze...