hope this helps
60 - 65 falcon same the small high spring front end , small block only ,and have welded shock tower braces on early cars
66 to the end in 68 Falcon have the mid size car front end ,think Fairlane , 66 and up .This will hold a big block .FE or 429
69.5 falcon is a cheap line Tornio
65/66 mustang have the small high spring front .bolt in shock tower braces
67 to 70 have a big block front end but is mustang/cougar only
71 to 73 mustang and 70 and 71 Torino have the new large front end ,for the 429
69 Maverick/Comet and later Grandia have new mid sized engine compartment.
While most/some front end parts cross over ,
the engine compartment sheet metal /fire wall were to : each car line and/or body line
the shock tower stampings and motor mounts were mostly the same ,but not always
Ford used this setup all the way up until 1980
As being around these cars since I can walk .
I would use the AMT new tool 66 Fairlane kit as being the closest.
RM 70 Torino is way to big The
new tool Amt 67/68 is no where close and is a joke
A new tool 65/66 Mustang would be most welcome
There has not been any engine compartment that is any were near be right , in any of the Ford kits
Now why did Ford put the high spring front end in the car to start ?