Are you using 5 to 6 lug adapters there? (Meaning those are 6 lug truck wheels?)
The car turned out great, I bet it's an absolute blast to drive!
I have to say, I'd have definately chosen some wheels with much less positive offset, but that's always easy to change, and it's your taste that is important for your car
My dad used to have a '70 duster with a 340, and I have heard plenty of stories about that car. Great work! How's that 550 hp feel?