I think the model companies (for a lack of better word) are guessing what New trucks will sell in scale. They build the International and people wish they did a new Kenworth or a Freightliner.
Plan for a long visit there, is what my late brother told me years ago. Don't take someone that wants to walk as fast as they can to get through it. LOL
I was driving in Monroe MI and spotted a dirty first generation convertible Cavalear. Just before that a 62 Chevy Impala formal roof and a 67-72 style Chevy truck. Funny now that I think about it, they were all red.
Sean I think you need to at least save that 400 engine and 350 trans before you let it go. Just make sure you have had a tetanus shot before you do that part. A good leaf blower will take off a few panels it looks like. If you swap it into the S10 you can call it a P10. Yes that would be to much work.