http://www.fordpinto.com/index.php?topic=22522.90In the above link you can (barely) see the support plate over the wiper arm hole. 7" will be into that plate by about 1/4". So the hump for the wiper arm from left to the right one would need to be cut out : means building your own wiper arm, and moving other things under the dash to make up for this.
The trans tunnel starting at the front, would have to be cut out to near the frame rails & narrow as you go backwards, to at least behind the OEM shifter hole.
Due to this, the OEM trans mounting / support bracket will be lost. New one in a new location will need to be made.
Means no room for a gas peddle. But, you will have to move it back anyway. Same for making a new brake peddle.
You will have to make your own seat brackets.
Steering column will need to be extended back. Means no rag joint. You will have to make new brackets to move the whole unit back 7". Then make the extension from the rack, using at least one U-joint. Maybe two, as your angles will change.
Look at the holes/slots in the windshield cowl. You will need to cut all but the last (outside on each side) 3 or 4. Or all of them.
7" goes to about 1/2" behind the slots. Close the right windshield wiper arm hole.