Mark,
I found some more pictures of the 70 and 69 together. If I get a chance later I will post them. They are from the 80's when I drove the '70 on the street.. Memories..The engine makes power to 7200, and Valve float happens at 7800 on the factory tach. Yep I drove it, raced it on the street, One day Topped it out to 130 on the factory Speedo, the rear mirror was shaking so bad you couldent see a damn thing too, hit a bump or dip in the road and the car would slightly lift, land and bark the tires as the rears grabbed pavement again...
How I managed not to blow it up is just pure luck, and with help of the 3:73's I am sure. Original engine still purrs like a kitty today...
Phil