Are the 1969 Mach 1's with the 390 c.i. rare? Were they built early in the production year and then phased out? Did they only come from the Dearborn Assembly Plant? Is this basically the same block the 427 was made from? What about the 428 and 429? What's the difference between the 427, 428, and 429 (besides the 1 c.i.)?
Now a general pony question, is there a listing somewhere of most rare to least rare mustangs?
I'm trying to understand the history of this big block/pony car match-up. Thanks!