What a great way to keep the legacy alive. This takes me back to my project in it's early days. I, too, was going to put a new floor in my truck before I changed tack...
302 is a great choice and I can't wait to see how this turns out! Please keep the pics coming. By the way, I see the windshield is cracked- I have my old glass from my '40 project if you need it. Still in one piece but one side has a BB shot in it.

Chris (Lumbah)