There was actually no real '64 model Mustang. They were assembled in late 1964 but were 1965 models. The '64, '65 and '66 are almost identical except for the very hot 2+2 fastbacks. In reality, all the old ponys were ill handling, slapped together rust buckets with sloppy steering and no brakes. Don't get me wrong - I love the old Mustangs but don't mistake them for a great car, cause they're NOT. If you drive it daily you have to live with overheating, hard starting, fouling spark plugs, sternum-crushing-rock hard steering wheel, no side impact beams in the doors, lap belts only (if you're lucky), brakes that are theoretical at best and tugboat handling. The upside of owning an old Mustang is the fact that you can always find it in a crowded parking lot (it's the one with all the people looking at it), they will run without oil, transmission fluid, fan belts or oil seemingly for hours on end and you can buy EVERY single part to totally restore one from a dozen different suppliers in the U.S. My advice? Buy the best example you can afford vs. trying to build one from the ground up. You will be thousands of dollars ahead in the long run.