Skip,
I did this conversion on my 56 3100 about 5 years ago using a kit from ABS. The drag link and pittman arm came with the kit. I would be happy to show you the finished product. I also did a write up for them for the installation process.
I can share it with you if you wish. I am not able to give you any info on a 3/4 ton as I don't know what the specific differences are. If you want to e-mail me direct I can give you my phone number and you can check it out.
Fred
