You know, when you put everything together, and the fact you are striving for originality, the idea of just skipping the 8 cyl. and repairing/rebuilding the 6 cyl might make more sense. It's true it's a bolt-in, BUT it's a major bolt-in, and requires a lot of parts that may be not only hard to get but prohibitively expensive. Plus add to the fact that the 239 was not only not a real good engine, it did not have much more power than the 6 cyl. As I said, for the 239, or the 292, I may have most or all the parts you need, it's your decision. If you are not real adept at this, and do not have the means to tear apart the truck to do it, just fix the 6 cyl. Understand this is only my opinion, and it's your truck, think it over carefully before you dive in. I'm only trying to help you see what this might become. Now maybe you can understand why a lot of guys just install a Windsor or an FE engine or even euew! a chevy, and improve the trans, and the rest of the truck at the same time. It's easier, and cheaper. Thus endeth the sermon for the day.