Maybe you should clue him in how much $$$ is in that car before you fill his head full of BS Greg. And why the heck would you mention using a stock engine if he knows he wants to race it.
Warhorse, I'd plan on a tube chassis if you want it to be really light and safe. If I were to redo mine again, it would have a full tube chassis. leg room is tight in it, but if you look at the pics Greg posted, I highly doubt those are both stock firewalls 100%. Yes the duramax will fit in there, but who cares. What will they do with out spray? LMAO! We drive the Vette on the street, we have even auto crossed it. Don't be afraid. LOL