Well, I've made up my mind that I am not going to go ahead with the 6.0L swap for now.
What I'm gonna do is take the TPI off this current engine, and set it aside until the new engine is ready to rock and roll. I'll put a good o'l q-jet on, along with the saddle tank + fuel lines from my 74. That would get my truck in totally driveable condition right there. I can then finish my sheet metal work, and get the truck in primer within a few weeks. It doesn't have to be perfectly straight for the epoxy priming, and then work on the bodywork over the winter, and hopefully paint it next spring. I'll put the TPI in as soon as I have figured out the new EFI engine