Get a 69 or 70 shop manual, a body manual and a Mustang 1964 1/2-1973 Restoration Guide. That's a good start, anyway. Note the several differences between 69 and 70 - dash, key location, steering column, front end parts - and make manuals choices as required.
1967 Falcon 4 door 351C-4V
1970 Mustang 351C-2V
http://raceabilene.com/kelly/hotrod
Owner built, owner abused.