Sounds like a cool project! I'm subscribing to this build! What made you decide on the 6.6L instead of like the 6.9/7.3L IDI? I think fitting the IDI would have been easier.

Do yo plan to narrow then Sterling rear so it fits your 67? Or are you going to run it full width?

And will just boxing the frame make it strong enough? That's alot of weight on the front!