Torque thrust D and wilwood

Well, American racing finally got back to me. They said the depth of the center cap from mounting surface is only .6"! Seems kinda shallow it but that would definitely make it where the wildwoods won't work.
So, looks like I will be going 73+ front disc set up. I really want the torque thrust D wheels, so now my dilemma is 15x7 with a 3.76" backspace or 15x6 with 3.66" backspace on the front. From searching the threads, it seems like with the 3.76" backspace the max tire for the front I could run is a 205/60 15. "Maybe" a 225/60 15 if I went with the 15x6 3.66 backspace?
On the back, I will be running an 8.8" rear with offset shackles. I want to run 15x8 4.5" backspace with 275/60 15.
I'm a little concerned that it may look odd with a 28" tire in the back and a 24.6" tire in the front?
My car is a 67 notch. Not drag racing. Street cruiser. I am wanting to go for the look in this pic as far as the stance and wheels and tires.
@72bluNblu I know you have given many on here some great insight. Would you mind giving me your thoughts?
Thanks!

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